Ehlers, Victor M. <br/><br/>
Municipal and rural sanitation  / 
by Victor M. Ehlers and Ernest W. Steel 
 - 3 
 - New York :   McGraw-Hill 
 - 449 p. 
<br/><br/><label>LCCN: </label>205327 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Energía Sanitaria
<br/><br/><label>Dewey Class. No.: </label>PA 628.7 E47 1943