Bibliography of North American geology, 1967. 

 -- Washington :   United States Government Printing Office,   1970 
 - 1029 p. -- 
 (Geological Survey Bulletin  ; 1267).
<br/><br/><label>Subjects--Topical Terms: </label><br/>América del Norte<br/>Bibliografías<br/>Geología
<br/><br/><label>Universal Decimal Class. No.: </label>55(7)(01)