1. Balzer, A. LeVon, “An Exploratory Investigation of Verbal and Nonverbal Behaviors of BSCS Teachers and Non-BSCS Teachers,” unpublished PhD dissertation, The Ohio State University, 1968.
2. Evans, Thomas P. “An Exploratory Study of the Verbal and Nonverbal Behaviors of Biology Teachers and Their Relationship to Selected Personality Traits,” unpublished PhD dissertation, The Ohio State University, 1968.