01729oam 2200517 450 991070380920332120150831095022.0(CKB)5470000002435644(OCoLC)882581836(EXLCZ)99547000000243564420140703d1918 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierSpirit leveling in Illinois, 1914 to 1917, inclusive /R. B. Marshall[Washington, D.C.] :Department of the Interior, United States Geological Survey,1918.Washington :Government Printing Office.1 online resource (108 pages, I page of plates) illustrationBulletin / Department of the Interior, United States Geological Survey ;672Title from title screen (viewed July 3, 2014)."Work done in cooperation with the State Geological Survey of Illinois."Includes index.LevelingIllinoisBench-marksIllinoisAltitudesfastIllinoisAltitudesIllinoisSurveysIllinoisfastLevelingBench-marksAltitudes.Marshall R. B(Robert Bradford),1867-1949,1387024Geological Survey (U.S.),Illinois State Geological Survey,COPCOPOCLCOOCLCAOCLCFGPOBOOK9910703809203321Spirit leveling in Illinois, 1914 to 1917, inclusive3461896UNINA