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- catalog alternative "Mineral conservation.".
- catalog contributor b4687263.
- catalog created "[1946]".
- catalog date "1946".
- catalog date "[1946]".
- catalog dateCopyrighted "[1946]".
- catalog extent "19 p.".
- catalog isPartOf "Mineral Industries Experiment Station. Circular 25".
- catalog isPartOf "Pennsylvania State University. Mineral Industries Experiment Station. Circular ; 25.".
- catalog issued "1946".
- catalog issued "[1946]".
- catalog language "eng".
- catalog publisher "State College, Pa., Pennsylvania State College, School of Mineral Industries".
- catalog spatial "United States.".
- catalog subject "Mines and mineral resources United States.".
- catalog title "Mineral conservation.".
- catalog title "Principles of mineral conservation.".
- catalog type "text".