EVOLUTION OF BRITISH AND AMERICAN MIDDLE AND UPPER JURASSIC GRYPHAEA - BIOMETRIC STUDY

[31] PALEOECOLOGICAL SIGNIFICANCE OF OPPORTUNISTIC SPECIES [J]. LETHAIA, 1970, 3 (01) : 69 - &

[32] MANSON V, 1964, 13 KANS GEOL SURV CO

[33] McLearn F.H., 1924, T R SOC CANADA, V18, P39

[34] Oria M., 1933, Bulletin de la Societe Linneenne de Normandie Caen (8), V5, P19

[35] Philip G. M., 1962, Geological Magazine, V99, P327

[36] PHILLIPI RA, 1899, FOSSILES SECUNDARIOS

[37] PUGACZEWSKA H, 1971, Acta Palaeontologica Polonica, V16, P389

[38] Schõfle L., 1929, GEOL PALAEONTOL ABH, V17, P65

[39] Stenzel H.B., 1971, TREATISE INVERTEBRAT, V3, pN953

[40] SYLVESTERBRADLE.PC, 1959, 15TH P INT C ZOOL LO, P193

[31] PALEOECOLOGICAL SIGNIFICANCE OF OPPORTUNISTIC SPECIES [J]. LETHAIA, 1970, 3 (01) : 69 - &

[32] MANSON V, 1964, 13 KANS GEOL SURV CO

[33] McLearn F.H., 1924, T R SOC CANADA, V18, P39

[34] Oria M., 1933, Bulletin de la Societe Linneenne de Normandie Caen (8), V5, P19

[35] Philip G. M., 1962, Geological Magazine, V99, P327

[36] PHILLIPI RA, 1899, FOSSILES SECUNDARIOS

[37] PUGACZEWSKA H, 1971, Acta Palaeontologica Polonica, V16, P389

[38] Schõfle L., 1929, GEOL PALAEONTOL ABH, V17, P65

[39] Stenzel H.B., 1971, TREATISE INVERTEBRAT, V3, pN953

[40] SYLVESTERBRADLE.PC, 1959, 15TH P INT C ZOOL LO, P193