APA (7th ed.) Citation

Spencer, E. R. (1985). Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills. U.S. Dept. of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Spencer, Ellsworth R. Lightweight Fiberglass Feed Leg for Hand-held Pneumatic Percussion Rock Drills. Pittsburgh, Pa.: U.S. Dept. of the Interior, Bureau of Mines, 1985.

MLA (9th ed.) Citation

Spencer, Ellsworth R. Lightweight Fiberglass Feed Leg for Hand-held Pneumatic Percussion Rock Drills. U.S. Dept. of the Interior, Bureau of Mines, 1985.