Manual of instruction for wastewater treatment plant operators / 

 - Albany :   Distributed by Health Education Service,   1978. 
 - Variages Pagess :    illustrations ;   22 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>    Sewage disposal plants.     
<br/><br/><label>Dewey Class. No.: </label>628.3   / MAN 1978