01836oam 2200517 450 991069862380332120150916133129.0(CKB)5470000002436409(OCoLC)882366317(EXLCZ)99547000000243640920140701d1910 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierResults of spirit leveling in Delaware, District of Columbia, Maryland, and Virginia, 1896 to 1909, inclusive /R.B. MarshallWashington, D.C. :Department of the Interior, United States Geological Survey,1910.Washington :Government Printing Office.1 online resource (74 pages)Geological Survey bulletin ;434Title from title screen (viewed June 30, 2014).On cover: "Work done in cooperation with the state of Maryland during the entire period and with the state of Virginia in part of 1908."Includes index.AltitudesfastDelawareAltitudesMarylandAltitudesVirginiaAltitudesWashington (D.C.)AltitudesDelawarefastMarylandfastVirginiafastWashington (D.C.)fastAltitudes.Marshall R. B(Robert Bradford),1867-1949,1387024Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910698623803321Results of spirit leveling in Delaware, District of Columbia, Maryland, and Virginia, 1896 to 1909, inclusive3508539UNINA