Principles of a resource/reserve classification for minerals
Subtitle: a revision of the classification system published as U.S. Geological Survey bulletin 1450-A
By: by the U.S. Bureau of Mines and the U.S. Geological Survey.
Contributors: Geological Survey (U.S.)
Series: Geological Survey circular ; 831; Geological Survey circular ;; 831.
Publisher: The Survey
Published: 1980
Place of publication: [Reston, VA]
Language: eng
Subjects: Mines and mineral resources -- United States -- Classification.
Notes: Edition for 1976 published under title: Principles of the mineral resource classification system of the U.S. Bureau of Mines and U.S. Geological Survey.