Cost analyses of model mines for strip mining of coal in the United States.
Series: Information circular; 8535; Information circular (United States. Bureau of Mines) ;; 8535.
Publisher: For sale by the Supt. of Docs., U.S. Govt. Print. Off.]
Published: 1972
Place of publication: [Washington
Language: eng
Number of pages: 116
Subjects: Coal mines and mining -- United States -- Costs.; Strip mining.