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1“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
2“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
3“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
4“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
5by Bruce, Robert A.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1977
Government Document Book -
6by Chaiken, Robert F.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1977
Government Document Book -
7“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
8“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
9by Miller, Kenneth J.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1977
Government Document Book -
10“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
11by Moebs, Noel N.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1977
Government Document Book -
12“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
13“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
14by Pariseau, William G.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1976
Government Document Book -
15by Harris, Henry M.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1976
Government Document Book -
16“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
17by Ferrell, Edward Francis“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1976
Government Document Book -
18“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
19“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book -
20“...Report of investigations (United States. Bureau of Mines) ;...”
Government Document Book