Gumtz, Garth D. <br/><br/>
Characterization of vessel wastes in Duluth superior harbor / 
by Garth D. Gumtz, David M. Jordan [and] Roibert Waller 
 - Washington, D.C. :  U.S. Government Printing Office,  1975 
 - vii, 52 p. ;  28 cm. 
 - Environmental protection technology series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ships--Safety regulations--United States<br/>Ships--Law and legislation--United States
<br/><br/><label>Dewey Class. No.: </label>343.730965