TY  - BOOK
AU  - Gagne, Robert M.
AU  - Briggs, Leslie J.
TI  - Principles of instructional design
SN  - 0030081718
U1  - 371.3 
PY  - 1974///
CY  - New York
PB  - Holt Rinehart and Winston
KW  - School Education
ER  -