Heady, H. H.
Assaying ores, concentrates, and bullion : revision of information circular 7695 / by H.H. Heady and K.G. Broadhead. - [Washington] : U.S. Dept. of the Interior, Bureau of Mines, [1976]. - 24 p. - Information circular ; 8714 . - United States. Bureau of Mines. Information circular ; 8714 . - Information circular (United States. Bureau of Mines) ; 8714 .
91055152
Ores--Analysis.--United States
Precious metals--Analysis.--United States
Testing laboratories--United States.
Assaying ores, concentrates, and bullion : revision of information circular 7695 / by H.H. Heady and K.G. Broadhead. - [Washington] : U.S. Dept. of the Interior, Bureau of Mines, [1976]. - 24 p. - Information circular ; 8714 . - United States. Bureau of Mines. Information circular ; 8714 . - Information circular (United States. Bureau of Mines) ; 8714 .
91055152
Ores--Analysis.--United States
Precious metals--Analysis.--United States
Testing laboratories--United States.