共 28 条
[2]
BENGTSON S, 1983, FOSSILS STRATA, V15, P5
[3]
Briggs D.E.G., 1983, SP PAP PALAEONTOL, V30, P249
[5]
Chlupae I., 1963, Paleontology, V6, P97
[6]
CLARK DL, 1981, TREATISE INVERTE W S, V2, pW102
[7]
Conway Morris S., 1977, SPECIAL PAPERS PALAE, V20, P1
[8]
Eldredge N., 1974, American Museum Novitates, VNo. 2543, P1
[9]
Erdtmann B.-D., 1974, Neues Jb Geol Paleont Abh, V144, P342