Coal mining techniques in the Federal Republic of Germany--1971.
Series: United States. Bureau of Mines. Information circular -- 8645; Information circular (United States. Bureau of Mines) -- 8645.
Publisher: U.S. Bureau of Mines
Published: 1974
Place of publication: [Washington]
Language: eng
Number of pages: 52
Subjects: Coal mines and mining -- Germany.; Mining engineering.; Mine roof bolting.
Notes: Includes bibliography.