Cady, Richard Carlysle,  1907-1943. <br/><br/>
Ground-water resources of northern Virginia, 
by R. C. Cady.  Prepared in cooperation with the United States Geological Survey. 
 - University, Va.,  1938. 
 - xii, 200 p.  incl. tables, diagrs. 7 pl. on 5 l. (incl. front., fold. map, fold. diagr.)  23 cm. 
 - Virginia. Geological Survey. Bulletin 50 .
 - Virginia.  Division of Mineral Resources.  Bulletin ;  50. .
<br/><br/> At head of title: Commonwealth of Virginia. State Commission on Conservation and Development. Virginia Geological Survey. 
<br/><br/><label>LCCN: </label>gs 39000107  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Groundwater--Virginia, Northern.<br/>Water-supply--Virginia, Northern.
<br/><br/><label>LC Class. No.: </label>QE173  / .A2 no. 50