EPSTEIN, Jack B. <br/><br/>
The Shawangunk formation (Upper Ordovician to middle silurian) in eastern Pennsylvania / 
by Jack B. Epstein and Anita G. Epstein. 
 -- Washington :   United States Government Printing Office,   1972 
 - 45 p. -- 
 (Geological Survey Professional Paper  ; 744).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estratigrafía<br/>Paleozoico<br/>Pennsylvania
<br/><br/><label>Universal Decimal Class. No.: </label>551.73(748)