%A Glaser, Robert %A Bloom, Benjamin Samuel %A University of Pittsburgh. Learning Research and Development Center %T Research and development and school change : a symposium of the Learning Research and Development Center, University of Pittsburgh, Robert Glaser and William Cooley, chairmen %I Lawrence Erlbaum Associates,distributed by Halsted Press Division, Wiley %D 1978 %U https://ci.nii.ac.jp/ncid/BA36332210