University of Pittsburgh. Learning Research and Development Center, Glaser, R., & Bloom, B. S. (1978). Research and development and school change: A symposium of the Learning Research and Development Center, University of Pittsburgh. Lawrence Erlbaum Associates ; Halsted Press Division, Wiley.

University of Pittsburgh. Learning Research and Development Center, Robert Glaser, and Benjamin S. Bloom. Research and Development and School Change: A Symposium of the Learning Research and Development Center, University of Pittsburgh. Hillsdale, N.J. : New York: Lawrence Erlbaum Associates ; Halsted Press Division, Wiley, 1978.

University of Pittsburgh. Learning Research and Development Center, et al. Research and Development and School Change: A Symposium of the Learning Research and Development Center, University of Pittsburgh. Lawrence Erlbaum Associates ; Halsted Press Division, Wiley, 1978.