01116cam a22002531  4500001001300000003000400013005001700017008004100034010001700075035001900092040005800111050002200169100004000191245013200231260002800363300010100391490004500492500012600537650003700663650003800700710002900738710003200767810006300799gs 39000107 DLC20260227111344.0791029s1938    vauabf       s001 0 eng c  ags 39000107   a(OCoLC)5623295  aU.S. Geol. Survey Libr.cNBrockUdNBrockUdOCoLCdDLC00aQE173b.A2 no. 501 aCady, Richard Carlysle,d1907-1943.10aGround-water resources of northern Virginia,cby R. C. Cady.  Prepared in cooperation with the United States Geological Survey.  aUniversity, Va.,c1938.  axii, 200 p.bincl. tables, diagrs. 7 pl. on 5 l. (incl. front., fold. map, fold. diagr.)c23 cm.1 aVirginia. Geological Survey. Bulletin 50  aAt head of title: Commonwealth of Virginia. State Commission on Conservation and Development. Virginia Geological Survey. 0aGroundwaterzVirginia, Northern. 0aWater-supplyzVirginia, Northern.2 aGeological Survey (U.S.)2 aVirginia Geological Survey.1 aVirginia.bDivision of Mineral Resources.tBulletin ;v50.