Carroll, Herbert B.
Accuracy and precision of several portable gas detectors : additional studies, a supplement to RI 7811 / by H. B. Carroll and F. E. Armstrong. - Washington, D.C. : Dept. of the Interior, 1975. - 34 p. : ill. - Report of investigations / Bureau of Mines, U.S. Dept. of the Interior; 8010 . - Report of investigations (United States. 8010 .
92035083
Mine gases.
Gas-detectors.
Accuracy and precision of several portable gas detectors : additional studies, a supplement to RI 7811 / by H. B. Carroll and F. E. Armstrong. - Washington, D.C. : Dept. of the Interior, 1975. - 34 p. : ill. - Report of investigations / Bureau of Mines, U.S. Dept. of the Interior; 8010 . - Report of investigations (United States. 8010 .
92035083
Mine gases.
Gas-detectors.