TY  - BOOK
AU  - Gropper,George Leonard
AU  - Glasgow,Zita
AU  - Klingensmith,Jean
TI  - Criteria for the selection and use of visuals in instruction: a workbook
PY  - 1971///
CY  - Englewood Cliffs, N.J.
PB  - Educational Technology Publications
KW  - Visual education
KW  - Programmed instruction
N1  - 'Prepared by the American Institutes for Research, Pittsburgh, Pennsylvania for the Bureau of Naval Personnel under contract no. N00022-68-C-0106.'
ER  -