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1
Cincinnati, OH : Risk Reduction Engineering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1989

Book
2
by Ahlness, Jon K.
[Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1980

Book
3
by Ahlness, Jon K.
[Washington, D.C.?] : U.S. Dept. of the Interior, Bureau of Mines, 1980

Government Document Book