1. Ten-State Nutrition Survey in the United States, 1968-70. V. Dietary. Publ. No. (HSM) 72-8133, 1972
2. National Center for Health Statistics: Dietary Intake Source Data, United States, 1971-74. DHEW Publ. No. (PHS) 79-1221, 1979
3. National Center for Health Statistics: Dietary Intake Source Data, United States, 1976-80. DHEW Series 11-231, 1983
4. Pao, E.M., and Mickle, S.: Problem nutrients in the United States. Food Technol September 1981, p. 58.
5. Burk, M.C., and Pao, E.M.: Methods for Large Scale Surveys of Household and Individual Diets. Home Economics Research Report No. 40, 1981