TY  - BOOK
AU  - Ryan,William T
AU  -  Hermanson, Roger H.   editor 
TI  - Programmed learning aid for principles of marketing
T2  - Irwin PLAID series.
SN  - 0256012903
U1  - 658.80077 23
PY  - 1976///
CY  - Homewood, Ill. : 
PB  - Learning Systems Co., 
KW  - Marketing
KW  - Programmed instruction.
N1  - Includes Index
ER  -