共 29 条
[21]
NEWBERRY JS, 1876, REPORT EXPLORING EXP, P66
[22]
OSBORN, 1918, MEM AM MUS NAT HIS 1, V2, P34
[23]
OSBORN HF, 1909, US GEOL SURV B, V361, P65
[24]
RENICK BC, 1931, 620 US GEOL SURV, P56
[25]
ROSS CS, 1931, T AM GEOPH UN 12 ANN, P185
[26]
SIMPSON GG, 1925, GEOL SOC AM BULL, V36, P230
[28]
STERRETT DB, 1913, US GEOL SURV B, V530, P383
[29]
WELLS EH, 1932, 5 STAT BUR MIN MIN R, P15