Carroll, Herbert B. <br/><br/>
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 .
<br/><br/><label>LCCN: </label>92035083     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine gases.<br/>Gas-detectors.