Mean annual runoff in the upper Ohio River basin, 1941-70, and its historical variation / 
by Robert M. Beall 
 - Washington :  U.S. Govt. Print. Off.,  1978 
 - 	iv, 32 p. :  ill. (2 folded in pocket) ;  23 cm. 
 - 	Geological Survey water-supply paper ;  no. 2042. .
<br/><br/> Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Runoff--Ohio River Watershed<br/>Runoff.<br/>Ohio River Watershed.