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CONODONTS FROM THE LEVIS FORMATION (ZONE D1) (MIDDLE ORDOVICIAN), LEVIS, QUEBEC.UYENO TT; BARNES CR.1970; GEOL. SURV. CANADA, BULL.; CAN; 1970, NUM. 0187, P. 99 A 104Miscellaneous

CONTRIBUTION A L'ETUDE DE LA FAUNE DES SCHISTES A NODULES ORDOVICIENS DU SYNCLINAL D'ANCENIS.CAVET P; PILLET J.1967; BULL. SOC. SCI. BRETAGNE; FRA; 1967, VOL. 42, P. 291 A 300Miscellaneous

SOBRE EL HALLAZGO DE CONODONTES EN LAS CALIZAS DE LA FORMACION SAN JUAN (ORDOVICICO, LLANVIRNIANO) QUEBRADA POTRERILLOS, SIERRA DE YANSO, DPTO. JACHAL (PROV. DE SAN JUAN = LE GISEMENT DE CONODONTES DANS LESHUENICKEN MA.1971; AMEGHINIANA; ARGENT. ; 1971, VOL. 8, NUM. 0001, P. 37 A 51Serial Issue

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MICROFOSSILS FROM THE CLEAVED SKIDDAW SLATES OF MURTON PIKE AND BROWNBER (CROSS FELL INLIER).LISTER TR; BURGESS IC; WADGE AJ et al.1969; GEOL. MAG.; GBR; 1969(2), VOL. 106, NUM. 0001, P. 97 A 99Miscellaneous

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THE AGE OF THE DURINE MEMBER OF THE DURNESS LIMESTONE FORMATION AT DURNESS.HIGGINS AC.1967; SCOTT. J. GEOL.; GBR; 1967, VOL. 3, NUM. 0003, P. 382 A 388Miscellaneous

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INTERES ESTRATIGRAFICO DE LOS PLACOPARIINAE EN EL ORDOVICICO. = L'INTERET STRATIGRAPHIQUE DES PLACOPARIINAE DE L'ORDOVICIENGIL CID MD.1975; BOL. GEOL. MIN.; ESP.; 1975, VOL. 86, NUM. 0004, P. 359 A 364Serial Issue

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ACROGRAPTUS, GENRE NOUVEAU DE L'ORDOVICIEN.CAJ DT.1969; PALEONTOL. ZH; SUN; 1969(3), NUM. 0001, P. 142 A 143Miscellaneous

STRATIGRAPHICAL SUB-DIVISIONS OF THE SKIDDAW SLATES OF THE LAKE DISTRICT.ROSE WC.1969; GEOL. MAG.; GBR; 1969(6), VOL. 106, NUM. 0003, P. 293 A 294Miscellaneous

LES CHITINOZOAIRES DES SCHISTES A CALYMENE (LLANVIRNIEN) DE NORMANDIERAUSCHER R; DOUBINGER J.1967; C.R. CONGR. SOC. SAVANTES, SECT. SCI., FR; FRA; 1967, VOL. 2, P. 471 A 484Miscellaneous

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EARLY ORDOVICIAN TRILOBITE COMMUNITIES.FORTEY RA.sdFOSSILS AND STRATA; NORWAY; (EVOL. MORPHOL. TRILOBITA, TRILOBITOIDEA MEROSTOMATA. PROC. NATO ADV. STUD. INST.; OSLO; 1973),1973,1975, NUM. 0004, P. 331 A 352Miscellaneous

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GISEMENT DE FER OOLITIQUE DE VELIZ (ORDOVICIEN DE BOHEME CENTRALEPETRANEK J.1972; CAS. MINERAL. GEOL.; CESKOSL. ; 1972, VOL. 17, NUM. 0003, P. 273 A 288Serial Issue

AGE OF THE EYCOTT VOLCANIC GROUP AND ITS CONFORMABLE RELATIONSHIP TO THE SKIDDAW SLATES IN THE ENGLISH LAKE DISTRICT.DOWNIE C; SOPER NJ.1972; GEOL. MAG.; G.B.; 1972, VOL. 109, NUM. 0003, P. 259 A 268Serial Issue

GEOLOGIA ESTRATIGRAFICA DE LA REGION DE LA SIERRA DE CAJAS. DPTO. HUMAHUACA(PROVINCIA DE JUJUY).ACENOLAZA FG.1968; REV. AS. GEOL. ARGENT; ARG; 1968(9), VOL. 23, NUM. 0003, P. 207 A 222Miscellaneous