Ray, R. M. <br/><br/>
Evaluation of small, color-changing carbon monoxide dosimeters / 
by R. M. Ray, H. B. Carroll, and F. E. Armstrong. 
 - [Washington] :  U.S. Dept. of the Interior, Bureau of Mines,  [1975] 
 - [3], 21 p. :  ill. 
 - Report of investigations ;  8051 .
 - United States.  Bureau of Mines.  Report of investigations ;  8051 .
 - Report of investigations (United States. Bureau of Mines) ;  8051. .
<br/><br/> Item 637-A 
<br/><br/><label>LCCN: </label>91055078     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Dosimeters.<br/>Mine gases.