Charles, John <br/><br/>
Research and public health  by John Charles. 

 - London  Oxford university  1961 
 - viii, 114p. 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public health - Reaserch Sanitation. 
<br/><br/><label>Dewey Class. No.: </label>614  / C31R