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|Material Type:||Government publication, National government publication, Periodical|
|Document Type:||Journal / Magazine / Newspaper|
|All Authors / Contributors:||United States. Bureau of Mines.|
|Description:||v. ; 25 cm.|
|Series Title:||Bulletin (United States. Dept. of Mines), no. 61, etc.|
|Responsibility:||Department of the Interior, Bureau of Mines.|