共 68 条
[1]
Alberstadt L.P, 1973, OKLAHOMA GEOLOGICAL, V117, P1
[2]
Amsden T.W., 1983, OKLAHOMA GEOLOGICAL, P1
[3]
[Anonymous], [No title captured]
[4]
[Anonymous], [No title captured]
[5]
Barnes C. R., 1981, INT UNION GEOLOGICAL, V8, P1
[6]
BERGMAN SC, 1981, GEOL SOC AM ABSTR, V13, P408
[7]
Bergstrom S. M., 1971, Mem Bur Rech Geol Minier, VNo. 73, P177
[8]
BERGSTROM S M, 1978, Palaeontology (Oxford), V21, P723
[9]
BERGSTROM SM, 1971, GEOL SOC AM MEM, V127, P83, DOI DOI 10.1130/MEM127-P83
[10]
BERGSTROM SM, 1986, PALEOBIOLOGY BIOSTRA, P61