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1
by Schatzel, Steven J.
[Avondale, Md] : United States Dept. of the Interior, Bureau of Mines, 1984
[Avondale, Md] : United States Dept. of the Interior, Bureau of Mines, 1984
Book
2
by Schatzel, Steven J.
[Avondale, Md] : United States Dept. of the Interior, Bureau of Mines, 1984
[Avondale, Md] : United States Dept. of the Interior, Bureau of Mines, 1984
Government Document
Book