Patent abstracts international : solid waste management, 1945-1969 
by Environmental Protection Agency, U.S.A. 
 - Washington  Environmental Protection Agency  1973 
 - v,437p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Refuse and refuse disposal --Patents.
<br/><br/><label>Dewey Class. No.: </label>X83 Un3 78C