Quality of surface waters of the United States, 1960 / 
[prepared by the Geological Survey] 
 - volúmenes 
<br/><br/>Contenido: Parte 3 y 4. Ohio river basin and St. Lawrence river basin" 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agua--Análisis--Estados Unidos
<br/><br/><label>LC Class. No.: </label>TD380  / Q83