Williams, Trefor.
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.
9241544007
Health education (Elementary)--Developing countries.
School children--Health and hygiene--Developing countries.
Food--Safety measures.--Developing countries
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.
9241544007
Health education (Elementary)--Developing countries.
School children--Health and hygiene--Developing countries.
Food--Safety measures.--Developing countries