Wood, Gordon H.  1919- <br/><br/>
Systematic Jointing in the Western Part of the Anthracite Region of eastern Pennsylvania / 
By Gordon H. Wood, Harold H. Arndt and Devereux Carter. 
 -- Washington :   United States Government Printing Office,   1969 
 - 17 p. + 1 plan. pleg. -- 
 (Geological survey Bulletin  ;  1271-D).
<br/><br/><label>Universal Decimal Class. No.: </label>552.1(748)