Hansen, Donald A. <br/><br/>
Geologic applications manual for portable gammaray spectrometers. 

 - n.p   : n.p.  (n.d.) 
 - v, 79p.   ; 28cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ganna rat soectrineter<br/>Spectrometer
<br/><br/><label>LC Class. No.: </label>GY QC787.56.H2