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- a41004377 contributor B12841964.
- a41004377 contributor B12841965.
- a41004377 contributor B12841966.
- a41004377 created "[1939]".
- a41004377 date "1939".
- a41004377 date "[1939]".
- a41004377 dateCopyrighted "[1939]".
- a41004377 description "Includes bibliographical references.".
- a41004377 extent "xvii, 169 p. :".
- a41004377 isPartOf "Mineral technology and output per man studies ; report no. E-8".
- a41004377 issued "1939".
- a41004377 issued "[1939]".
- a41004377 language "eng".
- a41004377 publisher "Philadelphia, Pa. : Works Progress Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines,".
- a41004377 spatial "United States.".
- a41004377 subject "Quarries and quarrying United States.".
- a41004377 subject "Stone industry and trade United States.".
- a41004377 subject "Stone, Crushed.".
- a41004377 subject "TN23 .N35 no. E-8".
- a41004377 title "Changes in technology and labor requirements in the crushed-stone industry / by Harry S. Kantor and Geoffrey A. Saeger.".
- a41004377 type "text".