APA (7th ed.) Citation

Lawrence, H. M., & O'Meara, R. G. (1930). Gravity concentration on certain Florida phosphatic sands. [publisher not identified].

Chicago Style (17th ed.) Citation

Lawrence, Horace Marshall, and R. G. O'Meara. Gravity Concentration on Certain Florida Phosphatic Sands. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Lawrence, Horace Marshall, and R. G. O'Meara. Gravity Concentration on Certain Florida Phosphatic Sands. [publisher not identified], 1930.