Goolsby, Donald A. <br/><br/>
Occurence and transport of agricultural chemistals in the Mississippi river basin :  July through August 1993 / 
by Donald A. Goolsby, William A. Battaglim and E. Michal Therman 
 - [S.l.] :  U.S. Geological Survey,  1993 
 - 22 p. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural chemicals--United States<br/>Food additives--United States
<br/><br/><label>Dewey Class. No.: </label>631.80973