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WATER QUALITY IN THE TIDAL POTOMAC RIVER AND ESTUARY, HYDROLOGIC DATA REPORT, 1979 WATER YEAR = QUALITE DE L'EAU DANS L'ESTUAIRE ET LA PARTIE SOUMISE A LA MAREE DU POTOMAC, RAPPORT DE DONNEES HYDROLOGIQUES, 1979BLANCHARD SF; HAHL DC.1981; OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; USA; DA. 1981; NO 81-1074; 960; BIBL. 19 REF.; 2 TAB. ; ILL.Serial Issue