Short papers in geology and hydrology : articles 1-59. 

 -- Washington :   United States Government Printing Office,   1963 
 - 219 p. -- 
 (Geological Survey Professional Paper , 475-B).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología
<br/><br/><label>Universal Decimal Class. No.: </label>55