Mechanization, Employment, and Output Per Man in Petroleum and Natural-Gas production by O.E. Kiessling [et al.]
Kiessling, O. E. (Oscar Edward), 1901-.
- Other contributors: National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.); United States. Bureau of Mines. xxvii, 346,  p. : ill., maps ; 26 cm. Mineral technology and output per man studies ; rept. no. E-10. UK holds archival copy for ASERL Collaborative Federal Depository Program libraries. Call number FW 4.7:E-10.
- This digital resource may be freely searched and displayed in accordance with U. S. copyright laws.
- Philadelphia, Pa. : Work Projects Administration, National Research Project in cooperation with Dept. of the Interior, Bureau of Mines
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