Lohman, Stanley William,  1907- <br/><br/>
Ground-water resources of Pennsylvania, 
by Stanley W. Lohman. Prepared in cooperation between the Geological Survey, United States Department of the Interior, and the Pennsylvania Topographic and Geologic Survey. 
 - Harrisburg, Pa.,  Dept. of Internal Affairs, Topographic and Geologic Survey,  1941. 
 - vi, 32 p.  fold. map  24 cm. 
 - Pennsylvania. Topographic and Geologic Survey. Bulletin W7 .
 - Bulletin W,  7. .
<br/><br/> At head of title: Pennsylvania Geologic Survey, fourth series. 
<br/><br/><label>LCCN: </label>gs 41000114  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Groundwater--Pennsylvania.<br/>Water-supply--Pennsylvania.
<br/><br/><label>LC Class. No.: </label>GB1025.P4  / L624 
<br/><br/><label>Dewey Class. No.: </label>551.4909748 
<br/><br/><label>Gov. Doc. Class. No.: </label>PY G345/4.3 W7