Ehlers, V.M. <br/><br/>
Municipal and rural sanitation 
by V.M. Ehlers and E.W. Steel 
 - 4th ed. 
 - New York  McGraw-Hill  1950 
 - 548p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sanitation
<br/><br/><label>Dewey Class. No.: </label>X8 Eh56