Biblioteca SEGEMAR

Vista normal Vista MARC Vista ISBD

Chase, Frank E.

Kettlebottoms : their relation to mine roof and support / by Frank E. Chase and Gary P. Sames. - [Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, 1983. - 12 p. : ill. ; 28 cm. - Report of investigations ; 8785 . - Report of investigations (United States. Bureau of Mines) ; 8785. .

Bibliography: p. 12.

LCCN: 83600100

Subjects--Topical Terms:
Coal mines and mining--Safety measures.
Kettlebottoms (Mining)
Mine roof control.

LC Class. No.: TN23 TN295 / .U43 no. 8785

Dewey Class. No.: 622 s 622/.8

Gov. Doc. Class. No.: I 28.23:8785