Bibliography of north American geology, 1963. 

 -- Washington :   United States Government Printing Office,   1968 
 - 1104 p. -- 
 (Geological Survey Bulletin  ; 1233).
<br/><br/><label>Subjects--Topical Terms: </label><br/>América del Norte<br/>Geología - Bibliografías
<br/><br/><label>Universal Decimal Class. No.: </label>55(7)(01)