1. Amidei, W. Select Panel on Child Health, Institute of Medicine, National Academy of Sciences, 1980 (personal communication to J. Butler).
2. Nutrition intervention in the Community: The WIC Program;Berkenfield;N. Engl. J. Med.,1980
3. Sensitivity bias and theory in impact evaluation;Boruch,1979
4. The influence of external political factors on the role and methodology of evaluation;Brickell,1978
5. Burke, V. “Income Security for Persons with Limited Income: Program Summaries, Recipient and Expenditure Data. Congressional Research Service, Library of Congress, 1976.