00639nam 2200157z- 450 9910712119803321(CKB)5470000002490917(EXLCZ)99547000000249091720230509c1970uuuu -u- -engQuality of surface waters of the United States, 1966. Parts 3-4, Ohio River Basin and St. Lawrence River BasinWashington, D.CUnited States Department of the Interior, Geological SurveyBOOK9910712119803321Quality of surface waters of the United States, 1966. Parts 3-4, Ohio River Basin and St. Lawrence River Basin3305881UNINA