Manual on Food and Nutrition Policy, FAO Nutritional Studies No. 22: prepared with the assistance of B. F. Johnston and J. P. Greaves, FAO of the United Nations, Rome, 1969. Available in U.S.A. from UNIPUB, Inc., 650 First Avenue, P. O. Box 433, New York, N.Y. 10016, $2.00, paperback, 95 p