Boettcher, R. A. <br/><br/>
Air classification of solid wastes :  performance of experimental units and potential applications for solid waste reclamation / 
by R. A. Boettcher 
 - Washington,D.C. :  U.S. Environmental Protection Agency,  1972 
 - viii, 73 p. :  ill. ;  26 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Refuse and refuse disposal<br/>Salvage (Waste, etc.)<br/>Separation (Technology)
<br/><br/><label>Dewey Class. No.: </label>628.445