共 18 条
[12]
MILLER LR, 1970, WESTERN SECTION AM S, V21, P213
[13]
NAKAGAWA HM, 1975, US GEOL SURVEY B, V1408, P85
[14]
REICHEN LE, 1951, 124 US GEOL SURV CIR
[15]
THORNTON I, 1977, P S MOLYBDENUM ENVIR, V2
[17]
WHITAKER SH, 1972, GEOLOGICAL MAP SASKA
[18]
1974, STRIPPING COAL DEPOS