01145cam a22002651 4500 gs 39000107 DLC 20260227111344.0 791029s1938 vauabf s001 0 eng c gs 39000107 (OCoLC)5623295 U.S. Geol. Survey Libr. NBrockU NBrockU OCoLC DLC QE173 .A2 no. 50 Cady, Richard Carlysle, 1907-1943. 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 At head of title: Commonwealth of Virginia. State Commission on Conservation and Development. Virginia Geological Survey. Groundwater Virginia, Northern. Water-supply Virginia, Northern. Geological Survey (U.S.) Virginia Geological Survey. Virginia. Division of Mineral Resources. Bulletin ; 50. 27528 27528