1. Balling , J. B. Falk , J. H. Aronson , R. “Pre-trip Programs: An Exploration of Their Effects on Learning from a Single-visit Field Trip to a Zoological Park” Science Education
2. Diamond , J. 1980 The Ethology of Teaching: A Perspective from Observations of Families in Science Centers Ph.D. dissertation University of California
3. “The Field Trip Milieu: Leanung and Behavior as a Function of Contextual Events”;Falk;Journal of Educational Research,1982