Text ( visual ) : unmediated Research and development and school change : a symposium of the Learning Research and Development Center, University of Pittsburgh, Robert Glaser and William Cooley, chairmen / edited by Robert Glaser ; contributors, Benjamin S. Bloom ... [et al.]. -- Hillsdale, N.J. : Lawrence Erlbaum Associates ; New York : distributed by Halsted Press Division, Wiley , 1978. -- xvi, 109 p. : ill. ; 24 cm. -- Includes bibliographies and index. -- ISBN 0470264152 ; (BA36332210) ; https://ci.nii.ac.jp/ncid/BA36332210 Author Heading(s): Glaser, Robert ; Bloom, Benjamin Samuel ; University of Pittsburgh. Learning Research and Development Center. -- Classification(s): LCC : LB1028 ; DC : 370/.78/073. -- Subject Heading(s): LCSH : Education -- Research -- United States -- Congresses