TY  - BOOK
AU  - Merrill,M.David
TI  - Instructional designs: readings 
SN  - 13-467803-6
U1  - Prof. 371.3 I598 1971 
PY  - 1971///
CY  - New Jersey
PB  - Prentice-Hall
KW  - Methods of instruction and study
N1  - Includes index
ER  -