01464oam 2200385Ia 450 991069904500332120180226145255.0(CKB)5470000002399436(OCoLC)317711891(EXLCZ)99547000000239943620090403d2008 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierHydrologic drought of water year 2006 compared with four major drought periods of the 20th century in Oklahoma[electronic resource] /by Robert L. Tortorelli ; prepared in cooperation with the Oklahoma Water Resources BoardReston, Va. :U.S. Geological Survey,2008.1 online resource (vi, 46 pages) digital, PDF fileScientific investigations report ;2008-5199Title from title screen (viewed Mar. 15, 2010).Includes bibliographical references (pages 36-38).DroughtsOklahomaHistoryDroughtsHistory.Tortorelli Robert L1388659Oklahoma Water Resources Board.Geological Survey (U.S.)OKDOKDOKUGPOBOOK9910699045003321Hydrologic drought of water year 2006 compared with four major drought periods of the 20th century in Oklahoma3471656UNINA