Tilling, Robert I. <br/><br/>
Distribution of thorium, uranium, and potassium in ignous rocks of the boulder batholith region, Montana, and its bearing on radiogenic heat production and heat flow:  shorter contributions to general geology / 
by Robert I. Tilling and David Gottfried 
 - Washington, D.C. :  United States Government Printing Office,  1969 
 - Various pagings :  ill. ;  22 cm. 
 - U.S. Geological Survey professional paper ;  Bull. no.614-E .
<br/><br/>Includes bibliography 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rocks--Igneous<br/>Uranium--Ignous rocks
<br/><br/><label>Dewey Class. No.: </label>552.17866