Henry Trapp, Jr. <br/><br/>
Hydrogeologic Framework Of The Northern Atlantic Coastal Plain In Parts Of North Carolina, Virginia, Maryland, Delaware, New Jersey & New York 

 - Regional Aquifer-System Analysis 
 - US Govt. Printing Off.  [date of publication not identified] 
 - p. 
 - Professional Paper 1404-G .
<br/><br/> US Geological Survey