Freedman, Robert W.
Use of vacutainers for collection of mine atmosphere samples / by Robert W. Freedman, William G. Humphrey, and Robert L. Craft. - [Washington] : U.S. Dept. of the Interior, Bureau of Mines, [1975]. - 7 p. : ill. - Report of investigations ; 7999 . - United States. Bureau of Mines. Report of investigations ; 7999 . - Report of investigations (United States. Bureau of Mines) ; 7999 .
91055170
Mine gases--Safety measures.
Use of vacutainers for collection of mine atmosphere samples / by Robert W. Freedman, William G. Humphrey, and Robert L. Craft. - [Washington] : U.S. Dept. of the Interior, Bureau of Mines, [1975]. - 7 p. : ill. - Report of investigations ; 7999 . - United States. Bureau of Mines. Report of investigations ; 7999 . - Report of investigations (United States. Bureau of Mines) ; 7999 .
91055170
Mine gases--Safety measures.