Multiple-shift mechanical mining in some bituminous-coal mines.
Progress report 3 /
by Albert L. Toenges and Earl R. Maize.

APA Citation

Toenges, A. L.., Maize, E. R., United States. Bureau of Mines. (1941). Multiple-shift mechanical mining in some bituminous-coal mines. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Toenges, Albert L., Earl R Maize, and United States. Bureau of Mines. Multiple-shift Mechanical Mining In Some Bituminous-coal Mines. Washington, D.C.: U.S. Dept. of the Interior, Bureau of Mines, 1941.

Warning: These citations may not always be complete (especially for serials).