Sedimentary phosphate resource classification system of the U.S. Bureau of Mines and the U.S. Geological Survey.
Contributors: Geological Survey (U.S.); United States. Bureau of Mines.
Series: Geological Survey circular ;; 882
Publisher: U.S. Dept. of the Interior, Geological Survey; Distribution Branch, Text Products Section, U.S. Geological Survey [distributor]
Published: 1982
Place of publication: [Reston, Va.?]; Alexandria, VA
Language: eng
Subjects: Phosphates -- United States -- Classification.; Sediments (Geology) -- United States -- Classification.
Notes: Bibliography: p. 9.
Item 620-A