Schaefer, Morris. <br/><br/>
Administration of environmental health programmes : a systems 

 - Geneva :  World Health Organization ;  1974. 
 - 242 pg. :  ill. ; 
<br/><br/><label>ISBN: </label>9241300590 : 
<br/><br/><label>LC Class. No.: </label>MED RA427  / S3