共 4 条
[1]
DAVIES DF, 1961, 4 P NAT CANC C, P291
[2]
HAMMOND EC, 1958, AM SCI, V46, P331
[3]
MACMAHON B, 1961, MAR AM CANC SOC SCIE
[4]
Pearl R, 1938, SCI MON, V46, P462