ZOOECIAL BOUNDARY PATTERNS IN THE MIDDLE ORDOVICIAN GENERA OF THE FAMILIES RHINIDICTYIDAE, STICTOPORELLIDAE AND PTILODICTYIDAE (BRYOZOA).KARKLINS OL.1968; ATTI SOC. ITAL. SCI. NAT. MUS. CIV. ST. NAT. MILANO; ITA; 1968(12), VOL. 108, P. 77 A 84Miscellaneous

THE BELEMNOCYSTITIDAE: SOLUTAN HOMEOMORPHS OF THE ANOMALOCYSTITIDAEPARSLEY RL.1972; J. PALEONTOL.; U.S.A.; 1972, VOL. 46, NUM. 0003, P. 341 A 347Serial Issue

MEMBERS OF THE EVERTON FORMATION (EARLY MEDIAL ORDOVICIAN) IN NORTHERN ARKANSAS. (ABSTRACT).SUHM RW.1970; PROC.NEBRASKA.ACAD.SCI.AFFIL.SOC; USA; 1970(4), VOL. 8Miscellaneous

CHAMPLAINIAN SERIES (MIDDLE ORDOVICIAN) IN WISCONSIN.OSTROM ME.1969; AMER. ASS. PETROLEUM GEOLOGISTS BULL.; USA; 1969(3), VOL. 53, NUM. 0003, P. 672 A 678Miscellaneous

Nejstarší obratlovci = Les vertébrés les plus vieuxROCEK, Z.1982, Vol 61, Num 3, pp 82-84, issn 0042-4544Article

Middle and upper Ordovician bradiopods from the Iberian chain (NE Spain) = Brachiopodes de l'Ordovicien moyen et supérieur dans la chaîne ibérique (NE de l'Espagne)VILLAS, E.International symposium on the Ordovician System. 4. 1982, 55Conference Paper

Silicified trilobites of the genus Dimeropyge from the Middle Ordovician of Virginia = Trilobites silicifiés du genre Dimeropyge de l'Ordovicien moyen de VirginieTRIPP, R. P; EVITT, W. R.1983, Num 30, pp 229-240, issn 0038-6804Article

Cavernes calcaires et développement karstique, à ZhoukoudianWANG FEIYAN.1983, Vol 2, Num 1, pp 41-48Article

Gastropodes de l'Ordovicien moyen de Ruoqiang, XinkiangYU WEN; NING HUI.Gǔshēngwùxué bào. 1983, Vol 22, Num 2, pp 199-203, issn 0001-6616Article

Ordovician rocky shoreline deposits ― the basal Trenton Group around Quebec City, Canada = Dépôts rocheux de lignes de rivages de l'Ordovicien. Groupe Trenton inférieur autour de la Ville du Québec, CanadaHARLAND, T. L; PICKERILL, R. K.Geological journal (Chichester). 1984, Vol 19, Num 3, pp 271-298, issn 0072-1050Article

Céphalopodes de l'Ordovicien moyen de l'Anhui et du ZhejiangQI DUN-LUN.Gǔshēngwùxué bào. 1984, Vol 23, Num 3, pp 270-275, issn 0001-6616Article

Caractéristiques de la composition chimique de la magnétite des gîtes ferrifères métasomatiques dans le sud de l'Hebei et dans d'autres régions et importance géologiqueSHEN BAOFENG.Dìzhì lùmpíng. 1979, Vol 25, Num 1, pp 10-18, issn 0371-5736Article

ETUDE DE LA STRATIGRAPHIE ET DES FOSSILES DE L'ORDOVICIEN MOYEN ET SUP DE WUDANG, GUIYANGYANG SHENG WU; WANG KE YONG.1980; DICENGXUE ZAZHI; ISSN 548421; CHN; DA. 1980; VOL. 4; NO 2; PP. 154-157; BIBL. 6 REF.; 1 TAB. ; TABL./COUPE GEOL.Article

PARTICULARITES DE LA GENESE DES FORMATIONS DE LA SERIE DE KRIVAYA LUKA, ORDOVICIEN MOYEN, DE L'INTERFLUVE DE LENA-TOUNGOUSKANIKOL'SKIJ FV; PODVEZKO AA.1980; GEOL. GEOFIZ. (NOVOSIB.); ISSN 0016-7886; SUN; DA. 1980; NO 8; PP. 35-46; ABS. ENG; BIBL. 5 REF.; ILL.Article

LES CONODONTES DE L'ORDOVICIEN MOYEN DE L'OURAL NORD ET LEUR SIGNIFICATION STRATIGRAPHIQUENASEDKINA VA; PUCHKOV VN.1979; TRUDY INST. GEOL. GEOKHIM., SVERDLOVSK; SUN; DA. 1979; NO 145; PP. 5-24; BIBL. 26 REF.; 3 PLANCH. ; PL.Article

LLANVIRN STRATIGRAPHY OF THE GALWAY-MAYO BORDER AREA, WESTERN IRELAND.ARCHER JB.1977; GEOL. J.; G.B.; DA. 1977; VOL. 12; NO 1; PP. 77-98; BIBL. 36 REF.; 12 ILL.Article

STROMATOPOROIDS OF THE CHAZY GROUP (MIDDLE ORDOVICIAN), LAKE CHAMPLAIN, VERMONT AND NEW YORK.KAPP US; STEARN CW.1975; J. PALEONTOL.; USA; 1975, VOL. 49, NUM. 0001, P. 163 A 186Serial Issue

ENVIRONMENTAL STUDY OF A PORTION OF THE MIDDLE ORDOVICIAN IN SEQUATCHIE VALLEY, EASTERN TENNESSEE.BLYTHE EW JR.1974; DISSERT. ABSTR. INTERNATION., B; USA; RESUME,1974, VOL. 35, NUM. 0006, P. 2820Serial Issue

GRAPTOLITES FROM THE MARTINSBURG FORMATION, LEHIGH GAP, EASTERN PENNSYLVANIAEPSTEIN JB; BERRY WBN.1973; J. RES. U.S. GEOL. SURV.; U.S.A. ; 1973, VOL. 1, NUM. 0001, P. 33 A 37Serial Issue

THE MIDDLE ORDOVICIAN OF THE OSLO REGION, NORWAY. XXIV. STAGE 4B AT LUNNER, HADELANDLAURITZEN OE.1973; NORSK GEOL. T.; NORGE ; 1973, VOL. 53, NUM. 0001, P. 25 A 40Serial Issue

NOUVEAU GENRE D'OSTRACODES DE L'ORDOVICIEN MOYEN DE SIBERIE ESTKOLOSNITSYNA GR.1973; PALEONTOL. ZH; SUN; 1973, NUM. 0001, P. 111 A 113Serial Issue

A NEW SPECIES OF POROCRINUS FROM THE MIDDLE ORDOVICIAN KIMMSWICK LIMESTONE OF MISSOURI.KESLING RV.1972; CONTRIB. MUS. PALEONTOL., UNIV. MICHIGAN; USA; 1972, VOL. 24, NUM. 0001, P. 1 A 7Miscellaneous

ANTIDUNE CROSS-STRATIFICATION IN A TURBIDITE SEQUENCE CLORIDORME FORMATION, GASPE, QUEBEC.1971; SEDIMENTOLOGY; NLD; 1971, VOL. 17, NUM. 0001-0002, P. 51 A 68Miscellaneous

ORDOVICIAN BRYOZOA FROM THE POGONIP GROUP OF MILLARD COUNTY, WESTERN UTAH.HINDS RW.1970; BRIGHAM YOUNG UNIV. GEOL. STUD.; 1970(5), VOL. 17, NUM. 0001, P. 19 A 40Miscellaneous

EVOLUTION DES OSTRACODES DU GENRE EGOROVELLA DE L'ORDOVICIEN MOYEN.IVANOVA VA.1968; PALEONTOL. ZH; SUN; 1968(6), NUM. 0002, P. 42 A 51Miscellaneous