Phosphate rock and methods proposed for its utilization as a fertilizer
By: by William H. Waggaman and William H. Fry
Contributors: Fry, William H. (William Henry), 1888-1932
Series: Bulletin / United States Department of Agriculture -- no. 312; Bulletin of the U.S. Department of Agriculture -- no. 312.
Publisher: U.S. Dept. of Agriculture
Published: 1915
Place of publication: Washington, D.C
Language: eng
Number of pages: 37
Subjects: Phosphate rock; Phosphatic fertilizer industry
Notes: Caption title.

"November 5, 1915."