Marketable phosphate rock.

Bibliographic Details
Previous Title:	Phosphate rock (Monthly)
Corporate Authors:	United States. Bureau of Mines, United States. Branch of Industrial Minerals, United States. Bureau of Mines. Branch of Data Collection and Coordination, Geological Survey (U.S.)
Format:	Government Document Journal
Language:	English
Published:	Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines.
Series:	Mineral industry surveys.
Subjects:	Phosphate rock > United States > Periodicals.
Online Access:	Adobe Acrobat reader required