共 20 条
[1]
ANSTEY RL, 1965, ES20 US AR NAT LAB T
[5]
BORN SM, 1970, B GEOL SOC AM, V81, P1233
[6]
BOWMAN D, 1971, PALAEOGEOGR PALAEOCL, V12, P183
[7]
BOWMAN D, 1974, THESIS HEBREW U
[8]
Bull W., 1964, US GEOLOGICAL SURVEY
[9]
Bull W.B., 1968, J GEOL EDUC, V16, P101
[10]
BULL WB, 1964, 352E US GEOL SURV PR