Fluorspar: its mining, milling, and utilization with a chapter on cryolite,
by Raymond B. Ladoo ...
|Main Author:||Ladoo, Raymond Bardeen, 1893-|
Washington, Govt. print. off., 1927.
At head of title: ... Department of commerce. Herbert Hoover, secretary. Bureau of mines. Scott Turner, director.
vi, 185 p. incl. illus., tables, diagr.
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