Defluorination of Fluorspar: Preparation of Aluminum Fluoride from Siliceous Fluorspar, Issues 6021-6040

Reconnaissance of Tellurium Resources in Arizona, Colorado, New Mexico and Utah: Including Selected Data from Other Western States and Mexico, Issues 6341-6360

In Situ Tests of Bearing Capacity of Roof and Floor in Selected Bituminous Coal Mines: A Program Report - Longwall Mining, Issues 7401-7420

Metallurgical Studies of Rhodonite Ores, Silverton District, Colorado (in Three Parts).: Beneficiation tests to produce manganese concentrates. Part 1