TY  - BOOK
AU  - Langdon,Danny G.
TI  - Interactive instructional designs for individualized learning
SN  - 0877780412
AV  - LB1570 .L27
U1  - 371.39/43 
PY  - 1972///, c1973]
CY  - Englewood Cliffs, N.J.
PB  - Educational Technology Publications
KW  - Instructional systems
KW  - Design
KW  - Individualized instruction
N1  - Bibliography: p. 146-147
ER  -