TY  - BOOK
AU  - Ryan,William T.
TI  - A guide to marketing
T2  - Irwin publications for professional development
SN  - 0256025762 (pbk.)
U1  - 658.8 19
PY  - 1981///
CY  - Homewood ; Ill.
PB  - Learning Systems Co.
KW  - Marketing
N1  - "An adaptation of material previously published in a programmed learning aid (PLAID) entitled Principles of marketing; Includes index
ER  -