THE LAST AMMONITES.BIRKELUND T.1978; IN: INT. SYMP. DEUTSCHE KREIDE. KURZFASSUNGEN; MUENSTER; 1978; S.L.; DA. 1978; PP. 3Conference Paper

ETUDES AU MICROSCOPE ELECTRONIQUE DE LA STRUCTURE DU TEST D'AMMONITES DU CRETACE SUPERIEUR (RESUME).BIRKELUND T.1968; GEOL. FOEREN. STOCKHOLM FOERH.; SWE; 1968(9), VOL. 90, NUM. 0534-003Miscellaneous

SUBMICROSCOPIC SHELL STRUCTURES IN EARLY GROWTH-STAGES OF MAASTRICHTIAN AMMONITES (SAGHALINITES AND SCAPHITES).BIRKELUND T.1967; GROENLANDS GEOL. UNDERSOEG., MISC. PAPERS; DNK; 1967, NUM. 0053, P. 95 A 101Miscellaneous

Cretaceous stages and their boundaries = Les étages du Crétacé et leurs limitesBIRKELUND, T.Mezhdunarodnyj geologicheskij kongress. 27. 1984, 24Conference Paper

AN INTEGRATED STRATIGRAPHICAL STUDY OF FOSSIL ASSEMBLAGES FROM THE MAASTRICHTIAN WHITE CHALK FOR NW EUROPEBIRKELUND T; SURLYK F.1973; GEOL. SOC. AMER., ABSTR. PROGRAMS; USA; DA. 1973; VOL. 5; NO 7; PP. 550-551Article

MIDDLE VOLGIAN AMMONITES AND TRACE FOSSILS FROM THE FREDERIKSHAVN MEMBER OF THE BREAM FORMATION, NORTHERN JUTLAND = LES AMMONITES ET LES ICHNITES DU VOLGIEN MOYEN DU MEMBRE FREDERIKSHAVN DE LA FORMATION BREAM, JUTLAND SEPTENTRIONALBIRKELUND T; PEDERSEN GK.1980; ARB.-DAN. GEOL. UNDERS; ISSN 0105-063X; DNK; DA. 1980; VOL. 1979; PP. 95-104; BIBL. 1 P.; ESQUISSE/COLONNE STRATIGR./ILL.Article

THE JURASSIC TRANSGRESSION AND THE MID-LATE JURASSIC SUCCESSION IN MILNE LAND, CENTRAL EAST GREENLAND = TRANSGRESSION JURASSIQUE ET SUCCESSION DU JURASSIQUE SUPERIEUR MOYEN DANS LE MILNE LAND, GROENLAND EST CENTRALCALLOMON JH; BIRKELUND T.1980; GEOL. MAG.; ISSN 0016-7568; GBR; DA. 1980; VOL. 117; NO 3; PP. 211-226; H.T. 3; BIBL. 1 P.; 3 PLANCH. ; ESQUISSE GEOL./COLONNE STRATIGR./ILL./PL.Article

HANERICERAS CF. PSEUDOGARDENI IN THE UPPER CRETACEOUS OF IGNABERGA, SWEDENBIRKELUND T; BROMLEY RG.1979; GEOL. FOEREN. STOCKHOLM FOERH.; SWE; DA. 1979; VOL. 121; NO 2; PP. 173-176; BIBL. 13 REF.Article

SHELL ULTRASTRUCTURES OF SOME MAASTRICHTIAN AMMONOIDEA AND COLEOIDEA AND THEIR TAXONOMIC IMPLICATIONS.BIRKELUND T; HANSEN HJ.1974; KGL. DANSKE VIDENSK. SELSK., BIOL. SKR.; DNK; 1974, VOL. 20, NUM. 0006, P. 1 A 34Serial Issue

THE GEOLOGY OF SOUTHERN JAMESON LANDSURLYK F; BIRKELUND T.1972; GROENLANDS GEOL. UNDERSOEG., RAPP.; DANM. ; 1972, NUM. 0048, P. 61 A 74Serial Issue

FIELD MAPPING IN UPPER PALAEOZOIC AND MESOZOIC SEDIMENTS OF SCORESBY LAND AND JAMESON LAND.BIRKELUND T; PERCH NIELSEN K.1969; GRONLANDS GEOL. UNDERSOG., RAPP.; DNK; 1969, NUM. 0019, P. 53 A 57Miscellaneous

FURTHER REMARKS ON THE POST-EMBRYONIC HYPOPHYLLOCERAS SHELL.BIRKELUND T; JOERGEN HANSEN H.1975; BULL. GEOL. SOC. DENM.; DENM.; 1975, VOL. 24, NUM. 0001-0002, P. 87 A 92Serial Issue

FIELD OBSERVATIONS IN UPPER PALAEOZOIC AND MESOZOIC SEDIMENTS OF SCORESBY LAND AND JAMESON LAND.BIRKELUND T; PERCH NIELSEN K.1968; GRONLANDS GEOL. UNDERSOG., RAPP.; DNK; 1968, NUM. 0021, P. 21 A 35Miscellaneous

The Kimmeridgian ammonites faunas of Milne Land, central East Greenland = Les faunes d'ammonites kimméridgiennes de la Terre Milne, Groenland oriental centralBIRKELUND, T; CALLOMON, J. H.1985, Num 153, issn 0105-3507, 56 p.Serial Issue

The Cretaceous of North Greenland ― a stratigraphic and biogeographical analysis = Le Crétacé du Nord du Groënland: analyse stratigraphique et biogéographiqueBIRKELUND, T; HÅNKANSSON, E.Zitteliana. 1983, Num 10, pp 7-25, issn 0373-9627Article

REVISION OF TRIASSIC STRATIGRAPHY OF THE SCORESBY LAND AND JAMESON LAND REGION, EAST GREENLAND.PERCH NIELSEN K; BIRKENMAJER K; BIRKELUND T et al.1974; MEDD. GROENLAND.; DNK; 1974, VOL. 193, NUM. 0006, P. 1 A 51Serial Issue

AN OUTLINE OF THE GEOLOGY OF THE ATLANTIC COAST OF GREENLAND.BIRKELUND T; PERCH NIELSEN K; BRIDGWATER D et al.1974; IN: OCEAN BASINS AND MARGINS. NORTH ATLANTIC; NEW YORK; PLENUM PRESS; DA. 1974; VOL. 2; PP. 125-159; BIBL. 4 P.; 11 ILL.Book Chapter

Biostratigraphy of some Callovian and Oxfordian cores off Vega, Helgeland, Norway = Biostratigraphie de carottes du Callovien et de l'Oxfordien au large de Vega, Helgeland, NorvègeÅRHUS, N; BIRKELUND, T; SMELROR, M et al.Norsk geologisk tidsskrift. 1989, Vol 69, Num 1, pp 39-56, issn 0029-196XArticle

Biostratigraphy of a Lower Cretaceous section from Sklinnabanken, Norway, with some comments on the Andøya exposure = Biostratigraphie d'une section du Crétacé inférieur de Sklinnabanken, Norvège et des commentaires sur la séquence d'AndøyaAARHUS, N; VERDENIUS, J; BIRKELUND, T et al.Norsk geologisk tidsskrift. 1986, Vol 66, Num 1, pp 17-43, issn 0029-196XArticle

The stratigraphy of the Upper Jurassic and Lower Cretaceous sediments of Milne Land, central East Greenland = La stratigraphie des sédiments du Jurassique supérieur et du Crétacé inférieur de la Terre Milne, centre du Groenland orientalBIRKELUND, T; CALLOMON, J. H; FÜRSICH, F. T et al.1984, Num 147, issn 0105-3507, 56 p.Serial Issue

The Hectoroceras kocki zone (Ryazanian) in the North Sea Central Graben and remarks on the Late Cimmerian unconformity = La zone à Hectoroceras kochi (Ryazanien) dans le graben central de la Mer du Nord et remarques sur la discordance du Cimmérien supérieurBIRKELUND, T; CLAUSEN, C. K; HANSEN, H. N et al.1983, Vol 1982, pp 53-72, issn 0105-063XArticle

THE UPPER CRETACEOUS AND DANIAN OF NW EUROPE. EXCURSION: 069 A. 26TH INTERNATIONAL GEOLOGICAL CONGRESS, PARIS, 1980 = LE CRETACE SUPERIEUR ET LE DANIEN D'EUROPE NORD OCCIDENTALE. EXCURSION 069 A. 26EME CONGRES GEOLOGIQUE INTERNATIONAL. PARIS, 1980BIRKELUND T ED; BROMLEY RG ED; ERNST G et al.1980; CONGRES GEOLOGIQUE INTERNATIONAL. 26/1980/PARIS; FRA; ORLEANS: B.R.G.M.; DA. 1980; 162 P.; 27 CM; BIBL. 25 P.; LIVRET-GUIDE, G20; 2 TAB. ; 4 PLANCH. ; TABL./ILL./ESQUISSE GEOL./COLONNE STRATIGR./PL.Conference Proceedings

The Lower Kimmeridge Clay at Westbury, Wiltshire, England = La formation d'argile du Kimmeridgien inférieur à Westbury, Wiltschire, AngleterreBIRKELUND, T; CALLOMON, J. H; CLAUSEN, C. K et al.Proceedings of the Geologists' Association. 1983, Vol 94, Num 4, pp 289-309, issn 0016-7878Article

CRETACEOUS-TERTIARY BOUNDARY EVENTS SYMPOSIUM, COPENHAGEN, SEPTEMBER 1979BIRKELUND T ED.1979; CRETACEOUS-TERTIARY BOUNDARY EVENTS SYMPOSIUM/1979/COPENHAGUE; DNK; COPENHAGEN: UNIVERSITY OF COPENHAGEN; DA. 1979; 2 VOL.+1 FASC., 210, 262 P.: ILL.; 27 CM; BIBL. DISSEM.; ISBN 87-980842-0-887-980842-1-6Conference Proceedings

Cretaceous stage boundaries: Proposals = Les limites des étages du Crétacé: propositionsBIRKELUND, T; HANCOCK, J. M; HART, M. B et al.Bulletin of the Geological Society of Denmark. 1984, Vol 33, Num 1-2, pp 3-20, issn 0011-6297Conference Paper