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Google圖書搜尋
Geology and Phosphate Deposits of the Permian Rocks in Central Western Montana
Earle Rupert Cressman
Ellis Leon Yochelson
Roger Warren Swanson
出版
U.S. Government Printing Office
, 1970
URL
http://books.google.com.hk/books?id=bznlzAEACAAJ&hl=&source=gbs_api
註釋
Descriptions of Permian rocks and of structure of enclosing rocks at north end of western phosphate field, with measured sections, chemical analyses, and phosphate resource tables.
