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.
Item 620-A