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1
2
by Ahlness, Jon K.
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1980
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1980
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Book
3
by Ahlness, Jon K.
[Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, 1980
[Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, 1980
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Government Document
Book