1.
|
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2006.
KF27 .E39 2006b |
|
2.
|
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O. [Congressional Sales Office], 2003.
KF26 .L2736 2002b |
|
3.
|
[Beckley, W. Va.?] : U.S. Dept. of Labor, Mine Safety and Health Administration, National Mine Health and Safety Academy, 2000.
|
4.
|
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., Congressional Sales Office, U.S. G.P.O., 1990.
Y 4.ED 8/1: 101-127 |
|
5.
|
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2007.
KF27 .E3 2007d |
|
6.
|
Washington : U.S. G.P.O. : [U.S. G.P.O., Supt. of Docs., Congressional Sales Office, distributor], 2000.
Y 4.ED 8/1: 106-120 |
|
7.
|
Pittsburgh, PA : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 1997.
HE 20.7130:9447 |
|
8.
|
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1995.
I 28.27: 9422 |
|