Emmons, William H. 1876-

The enrichment of sulphide ores / by William Harvey Emmons. - Washington, Govt. Print. Off., 1913. - 260 p. ; 24 cm. - U.S. Geological survey. Bulletin 529 . - United States. Geological Survey. Bulletin ; 529. .

Includes index.

gs 13000377


Sulfides.

QE75 / .B9 no. 529