Kline, Nettie <br/><br/>
Quiet guardians of the people's health 

 - New York :   Public Affairs Committee,  1969. 
 - 20p.  : ill.   ; 19cm.  
 - Public Affairs Pamphlet       322 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sanitary engineering
<br/><br/><label>LC Class. No.: </label>PAM TD148.K55