Atta AVn, Robert O. <br/><br/>
Microscopic and x-ray examination of rock for durability testing / 
by Robert O. Van Atta and Harry Ludowise 
 - Washington, D. C. :  United States Government Printing Office,  1976 
 - vi, 90 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petrology<br/>Rocks, Igneous
<br/><br/><label>Dewey Class. No.: </label>552.1