Hheppard, Richard A. <br/><br/>
Diagenesis of Tuffs in the Barstow formation, mud hills, San Bernardino County, California / 
Richard A. Hheppard and Arthur J. Gude 
 - Washington, D.C :  United States Government Printing Office,  1969 
 - 35 p. ;  24 cm. 
 - Geological Survey professional paper ;  v634 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tuffs--California<br/>Geology--Survey--California
<br/><br/><label>Dewey Class. No.: </label>552.2309794