Title: Principles of the mineral resource classification system of the U.S. Bureau of Mines and U.S. Geological Survey
Subtitle: a report published jointly by the U.S. Bureau of Mines and U.S. Geological Survey.
First published: 1976
Subjects: Mines and mineral resources, Classification, Minerals
Places: United States
LC classification: QE75 .B9 no. 1450-A, TN153 .B9 no. 1450-A