Learning better nutrition : a second study of approaches and techniques /
by Jean A. S. Ritchie.
- Rome : Food and Agriculture Organization of the United Nations, 1967 [c1968]
- xii, 264 p. : illus. ; 23 cm.
- FAO nutritional studies no. 20 .
- Food and Agriculture Organization of the United Nations. FAO nutritional studies no. 20 .