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- a49010362 contributor B12858554.
- a49010362 contributor B12858555.
- a49010362 created "[1949]".
- a49010362 date "1949".
- a49010362 date "[1949]".
- a49010362 dateCopyrighted "[1949]".
- a49010362 extent "37 p.".
- a49010362 isPartOf "Pennsylvania State College. Mineral Industries Experiment Station. Bulletin ; no. 50.".
- a49010362 isPartOf "Pennsylvania. State College. Mineral Industries Experiment Station. Bulletin, no. 50".
- a49010362 issued "1949".
- a49010362 issued "[1949]".
- a49010362 language "eng".
- a49010362 publisher "[The Pennsylvania State College] School of Mineral Industries".
- a49010362 subject "Mining engineering.".
- a49010362 subject "TN275 .B58".
- a49010362 subject "Time study.".
- a49010362 title "More profit in mechanical mining through studies of loading and gathering performance, by A. Wayne Bitner and David R. Mitchell.".
- a49010362 type "text".