共 43 条
[1]
BERGGREN WA, 1974, PALAEOGEOGR PALAEOCL, V16, P1
[2]
Boucot A. J, 1975, DEV PALAEONTOLOGY ST, V1
[3]
BOUCOT AJ, 1975, J PALEONTOL, V49, P1105
[4]
COATES AG, 1973, J PALEONTOL, V47, P953
[5]
COBBAN W. A., 1951, BULL AMER ASSOC PETROLEUM GEOL, V35, P2170
[6]
COBBAN WA, 1952, GEOL SOC AM BULL, V63, P1011, DOI 10.1130/0016-7606(1952)63[1011:COTCFO]2.0.CO
[7]
2
[8]
COBBAN WA, 1971, 699 US GEOL SURV PRO
[9]
COBBAN WA, 1972, 645 US GEOL SURV PRO
[10]
HALLAM A, 1977, Paleobiology, V3, P58