Mineral Industries Survey of the United States: California, Kern County, Mojave District: The Golden Queen and other Mines of the Mojave District, California (open access)

Mineral Industries Survey of the United States: California, Kern County, Mojave District: The Golden Queen and other Mines of the Mojave District, California

Report issued by the U.S. Bureau of Mines discussing the mineral production of mines in Kern County, California. Mining and milling methods of these mines are presented. This report includes tables, maps, illustrations, and photographs.
Date: January 1937
Creator: Julihn, C. E. & Horton, F. W.
System: The UNT Digital Library
Methods and Costs of Mining and Preparing Sand and Gravel at the Plant of the Ward Sand and Gravel Co., Oxford, Michigan (open access)

Methods and Costs of Mining and Preparing Sand and Gravel at the Plant of the Ward Sand and Gravel Co., Oxford, Michigan

Report issued by the U.S. Bureau of Mines discussing the operation and production of the Ward Sand and Gravel Company in Oxford, Michigan. The methods and costs employed by the company are presented. This report includes tables, and illustrations.
Date: January 1932
Creator: Ward, Frederick L.
System: The UNT Digital Library
Method and Cost of Dredging Sand and Gravel by the Ohio River Sand Co., Louisville, Kentucky (open access)

Method and Cost of Dredging Sand and Gravel by the Ohio River Sand Co., Louisville, Kentucky

Report issued by the U.S. Bureau of Mines discussing dredging methods of used by the Ohio River Sand Company. The different methods and costs used to recover gravel and sand are described. This report includes tables and illustrations.
Date: January 1931
Creator: Duffy, J. Hamilton
System: The UNT Digital Library