Why miners' portable electric lamps require safety devices /
by L.C. Ilsley.

APA Citation

Ilsley, L. C. (Lee Clyde)., United States. Bureau of Mines. (1922). Why miners' portable electric lamps require safety devices. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Ilsley, L. C. (Lee Clyde), 1880-, and United States. Bureau of Mines. Why Miners' Portable Electric Lamps Require Safety Devices. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1922.

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