01255oam 2200385 a 450 991069747200332120120619120916.0(CKB)5470000002388220(OCoLC)425839644(EXLCZ)99547000000238822020090715d2004 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierThe history of North American waterfowl surveys[electronic resource] 50 years & still counting /U.S. Fish and Wildlife ServiceArlington, Va. :U.S. Fish & Wildlife Service,[2004]2 unnumbered pages digital, PDF fileTitle from title screen (viewed July 15, 2009)."December 2004."History of North American waterfowl surveys BirdsConservationNorth AmericaWaterfowlNorth AmericaBirdsConservationWaterfowlU.S. Fish and Wildlife Service.GPOGPOUXWGPOBOOK9910697472003321The history of North American waterfowl surveys3536538UNINA