1. 2. The Vending of Food and Beverages, US Dept of Health, Education and Welfare, Public Health Service, 1965, p 19.
2. 3. Vending Machine Competition with the National School Lunch Program, US Senate Hearings before the Select Committee on Nutrition and Human Needs, Ninety-Third Congress, April 1973, p 184.
3. A survey of breakfasts eaten by high school students;Harris;J Sch Health,1970