1974
“An evaluation of the Mulligan Stew 4-H television series for Extension Service, USDA Vol. 1, Executive Summary”. AAI-74-120. Cambridge, MA: ABT Associates. https://files.eric.ed.gov/fulltext/ED134618.pdf
. 1974. “An evaluation of the Mulligan Stew 4-H television series for Extension Service, USDA. Vol II, Report of the Study”. AAI-74-120. Cambridge, MA: ABT Associates. https://files.eric.ed.gov/fulltext/ED134619.pdf
. 1974.