Ryan, William John. <br/><br/>
Water treatment and purification, 
by William J. Ryan. 
 - 2d ed. 
 - New York and London,  McGraw-Hill book company, inc.  [c1946] 
 - ix, 270 p.  illus., diagrs. (1 fold.)  21 cm. 
<br/><br/>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Feed-water purification.<br/>MCE<br/>Water--Purification.
<br/><br/><label>Dewey Class. No.: </label>628.16  / RYA