Manual of instruction for water  x <br/><br/>
Manual of instruction for water treatment plant operators  x 

 - x 
 - N. Y  Health Education Service,  19,,, 
 - xv,308p. 
<br/><br/>
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment, Public Health. 
<br/><br/><label>Dewey Class. No.: </label>614/MAN