The National Safety Competitions of 1948-58 /
by John C. Machisak and Elizabeth K. Elsner.
APA Citation
Machisak, J. C., Elsner, E. K. (1960). The National Safety Competitions of 1948-58. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.
MLA Citation
Machisak, John C, and Elizabeth K Elsner. The National Safety Competitions of 1948-58. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1960.
Warning: These citations may not always be complete (especially for serials).