共 36 条
[1]
ADRAIN JM, 1996, GEOL SOC AM ABSTR, V28, pA291
[2]
[Anonymous], 1992, ORIGINS EARLY EVOLUT
[3]
Anstey Robert L., 1995, P239
[4]
BRENCHLEY P, 1990, MASS EXTINCTGIONS PR, P104
[6]
Cope JCW, 1997, PALAEONTOLOGY, V40, P713
[7]
Cope JCW, 1996, PALAEONTOLOGY, V39, P979
[8]
CULVER SJ, 1987, PALEOBIOLOGY, V13, P169
[9]
Droser M. L., 1995, ORDOVICIAN ODYSSEY, P405
[10]
Droser ML, 1996, AM SCI, V84, P122