共 7 条
[1]
HOUSE M, 1973, ORGANISMS CONTINENTS, P305
[2]
SATO T, 1964, JPN J GEOL GEOG, V36, P149
[4]
SAUNDERS WB, NATL GEOG SOC RES RE
[5]
Stenzel HB., 1964, TREATISE INVERTEBRAT, pK59
[6]
TEICHERT C, 1970, Journal of Paleontology, V44, P1129
[7]
1974, NATIONAL GEOGRAPHIC