Phosphate-rock resources of the United States
By: by James B. Cathcart, Richard P. Sheldon, and Robert A. Gulbrandsen
Contributors: Sheldon, Richard Porter, 1923-; Gulbrandsen, Robert A; Geological Survey (U.S.)
Series: Geological Survey circular -- 888
Publisher: Geological Survey
Published: 1984
Place of publication: Alexandria, VA
Language: eng
Number of pages: 48
Subjects: Phosphate rock -- United States
Notes: Bibliography: p. 46-48