LOCKWOOD, W. N. <br/><br/>
Illinoian Outwash in Southeastern Pennsylvania / 
by W. N. Lockwood and Harold Meisler. 
 -- Washington :   United States Government Printing Office,   1960 
 - 9 p. -- 
 (Geological Survey Bulletin  ;  1121-B).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología<br/>Pennsylvania
<br/><br/><label>Universal Decimal Class. No.: </label>55(748)