Williams, Trefor. <br/><br/>
Food, environment, and health :  a guide for primary school teachers / 
Trefor Williams, Alysoun Moon, Margaret Williams. 
 - Geneva :  World Health Organization,  1990. 
 - xix, 129 p. : 
<br/><br/><label>ISBN: </label>9241544007 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health education (Elementary)--Developing countries.-
<br/><br/><label>Dewey Class. No.: </label>371.716  / Fo