Technology, employment, and output per man in phosphate-rock mining, 1880-1937 / by A. Porter Haskell, Jr. and O.E. Kiessling.

; Kiessling, O. E. (Oscar Edward), 1901- ; United States. Bureau of Mines ; National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Philadelphia, Pa. : Works Progress Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines, [1938] .

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Other Authors Kiessling, O. E. 1901-
United States. Bureau of Mines.
National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.)
Subjects Miners -- United States.
Mining machinery.
Phosphate industry -- United States.
Phosphate mines and mining -- United States.
Description xvi, 130 pages : illustrations, 1 map ; 26 cm.
Copyright Date [1938]
Notes Includes bibliographical references.
Geographic Area United States
Network Numbers (OCoLC)05900750
(OCoLC)5900750
WorldCat Search OCLC WorldCat
WorldCat Identities Haskell, A. Porter.
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