Biblioteca SEGEMAR

Vista normal Vista MARC Vista ISBD

Allwes, Richard A.

Evaluation of structures for roof-fall areas / by Richard A. Allwes and C.P. Mangelsdorf. - Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1992] - 31 p. : ill. ; 28 cm. - Report of investigations ; 9414 . - Report of investigations (United States. Bureau of Mines) ; 9414. .

Includes bibliographical references (p. 20).

LCCN: 91041643

Subjects--Topical Terms:
Mine roof control.
Metal arches--Testing.

LC Class. No.: TN23 TN288 / .U43 no. 9414

Dewey Class. No.: 622 s 622/.28

Gov. Doc. Class. No.: I 28.23:9414