Coal resource classification system of the U.S. Bureau of Mines and U.S. Geological Survey
Subtitle: a report
By: published jointly by the U.S. Bureau of Mines and U.S. Geological Survey.
Contributors: Geological Survey (U.S.)
Series: Mineral resource classification systems of the U.S. Bureau of Mines and U.S. Geological Survey; Geological Survey bulletin ; 1450-B; Geological Survey bulletin ;; 1450-B.
Publisher: U.S. Govt. Print. Off.
Published: 1976
Place of publication: Washington
Language: eng
Subjects: Coal -- United States -- Classification.
Notes: "Definitions of coal resource classification terms used by the U.S. Bureau of Mines and U.S. Geological Survey."