TY  - GEN
AU  - Gray,D E
TI  - Planning visual media for self-instruction
SN  - 0274-497X
PY  - 1980///1218
KW  - Audiovisual Aids
KW  - Educational Measurement
KW  - Humans
KW  - Learning
KW  - Programmed Instructions as Topic
KW  - Time Factors
N1  - Publication Type: Journal Article
ER  -