APA (7th ed.) Citation

United States. Bureau of Mines. (1938). Effect of angle of drilling on dust dissemination. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Effect of Angle of Drilling on Dust Dissemination. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Bureau of Mines. Effect of Angle of Drilling on Dust Dissemination. [s.n.], 1938.