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. :  ill. 
<br/><br/>
<br/><br/><label>ISBN: </label>9241544007 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Health education (Elementary)--Developing countries.<br/>School children--Health and hygiene--Developing countries.<br/>Food--Safety measures.--Developing countries