Chekan, G. J.
Design of bulkheads for controlling water in underground mines / by Gregory J. Chekan. - [Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, 1985. - ii, 36 p. : ill. - Information circular ; 9020 . - Information circular (United States. Bureau of Mines) ; 9020 .
Mine drainage.
Mine water.
TN295 TN321 / .U4 no. 9020
622 s 622/.5�19
I 28.27:9020
Design of bulkheads for controlling water in underground mines / by Gregory J. Chekan. - [Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, 1985. - ii, 36 p. : ill. - Information circular ; 9020 . - Information circular (United States. Bureau of Mines) ; 9020 .
Mine drainage.
Mine water.
TN295 TN321 / .U4 no. 9020
622 s 622/.5�19
I 28.27:9020