Ehlers, Victor M.  1884-1959 <br/><br/>
Municipal an rural sanitation / 
By Víctor m. ehlers and Ernest w. steel. 
 - 5 
 - 596 páginas 
 - McGraw-Hill series in sanitary science and water resources engineering .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ingeniería sanitaria<br/>Saneamiento<br/>Salud rural<br/>Salud pública
<br/><br/><label>LC Class. No.: </label>RA425  / E5 1958