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Start Over Author Government Printing Office Sudoc Stem I 28.23

1. Asphalt. Some asphalts from Oregon Basin, Wyo., crude oil; by K. E. Stanfield.

Corporate/Agency Authors:: Mines Bureau and Government Printing Office
Publisher:: Mines Bureau
Date:: Mar. 1939
SuDoc number:: I 28.23:3435

2. Electrometallurgy. Progress reports, Metallurgical Division: 30, Electrometallurgical investigations, recovery of potassium sulphate and alumina from alunite by fusion with boric acid; by J. Koster, R. G. Knickerbocker, A. L. Fox, and P. R. Perry.

Corporate/Agency Authors:: Mines Bureau and Government Printing Office
Publisher:: Mines Bureau
Date:: Mar. 1939
SuDoc number:: I 28.23:3438

3. Ores. Progress reports, Metallurgical Division: 31, Ore-dressing studies, flotation of southern Illinois lead-zinc-fluospar ores; by J. B. Clemmer, W. E. Duncan, F. D. DeVaney, and M. Guggenheim.

Corporate/Agency Authors:: Mines Bureau and Government Printing Office
Publisher:: Mines Bureau
Date:: Mar. 1939
SuDoc number:: I 28.23:3437