Gumtz, Garth D. <br/><br/>
Characterization of vessel wastes in duluth-superior harbor / 1974 
by Garth D. Gumtz, David M. Jordon and Robert Waller 
 - Washington, D.C. :  United States Environmental Protection Agency,  1974 
 - vi, 51 p. :  ill.,  29 cm. 
 - Environmental protection technology series .
<br/><br/> EPA-670/2-74-097 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wastes<br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>363.728