"Jefferson County, Oregon" . . "1914" . . . . . . . . . . . . . . "Jefferson County" . . . . . . . . . . . . . . . . . . . . . . . . . . "2.589988110336E7" . . . . . . . . . . . . . . . . . . "4.612768824508416E9" . . . . . . . . . . . . . . . . . . . . "Jefferson counties" . . . . . . . . . . . . . . . . . . . "Jefferson County, Oregon" . . . "Oregon" . . . . "0.6" . . "4.638668705611776E9" . . "Jefferson County, Oregon#History" . . . . . . . . . . . . . . . . . . "4.633225902509351" . . . . "'''Jefferson County'''" . . . "Jefferson" . . . . . . . . . "Jefferson County Education Service District" . . . . . . . . . . . . . . . . . . . . . . .