共 23 条
[1]
BLAKE SF, 1953, SMITHSONIAN I PUBLS, V121
[4]
EKBLAW GE, 1955, T ILLINOIS STATE ACA, V47, P129
[6]
EVELAND HE, 1952, 159 ILL STAT GEOL SU, P30
[8]
FRYE JC, 1949, AM J SCI, V247, P887
[9]
HOPKINS DM, 1953, SMITHSONIAN I PUBLS, V121