Cooper, W. E.  1955- <br/><br/>
International intercalibration and intercomparison program radon daughter measurements :  exercise at the Twilight Mine, Uravan, CO / 
by W.E. Cooper and R.F. Holub. 
 - Washington, D.C. :  U.S. Dept. of the Interior, Bureau of Mines,  1990. 
 - 13 p. :  ill. 
 - Information circular ;  9257 .
 - Information circular (United States. Bureau of Mines) ;  9257 .
<br/><br/><label>LCCN: </label>90001743 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine gases--Measurement.--Colorado--Twilight Mine<br/>Radon--Isotopes--Measurement.