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Metals -- Refining

 Subject
Subject Source: Library of Congress Subject Headings

Found in 1 Collection or Record:

United States Bureau of Mines Arizona Mining Films

 Collection — Box 1
Identifier: MS-706
Abstract

Films, undated, of copper mining, refining, leaching and smelting in Arizona by the United States Bureau of Mines at locations owned by the Phelps Dodge Corporation.

Dates: undated