Carroll, Herbert B. <br/><br/>
Controlled-atmosphere system for testing gas monitors 
Carroll, Herbert B.; Ray, R. M.; Armstrong, Frederick E. 
 - Washington  Bureau of mines  1973 
 - 10 p. 
 - RI 7859 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>GEOFISICA<br/>GEOPHYSICS
<br/><br/><label>Subjects--Index Terms: </label>DETECTORES DE GAS PRUEBAS GAS DETECTORS TESTING 
<br/><br/><label>Universal Decimal Class. No.: </label>55