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- catalog contributor b6486102.
- catalog contributor b6486103.
- catalog contributor b6486104.
- catalog contributor b6486105.
- catalog created "[1938]".
- catalog date "1938".
- catalog date "[1938]".
- catalog dateCopyrighted "[1938]".
- catalog description "Includes bibliographical references.".
- catalog extent "xv, 114 p. :".
- catalog isPartOf "Mineral technology and output per man studies ; report no. E-6".
- catalog isPartOf "Mineral technology and output per man studies ; rept. no. E-6.".
- catalog issued "1938".
- catalog issued "[1938]".
- catalog language "eng".
- catalog publisher "Philadelphia, Pa. : Works Progress Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines,".
- catalog spatial "United States.".
- catalog subject "Mining machinery.".
- catalog subject "Ores United States.".
- catalog subject "TN23 .N35 no. E-6".
- catalog title "Grade of ore / by Andrew V. Corry and O.E. Kiessling.".
- catalog type "text".