TY  - BOOK
ED  - American Management Association.
TI  - Maintaining the product portfolio: the commercial development concept
T2  - AMA management report
AV  - HF5415 .A44 1960
PY  - 1960///]
CY  - New York
PB  - Research and Development Division
KW  - Marketing
KW  - New products
N1  - "Based mainly on presentations at 1959-60 conferences of AMA's Research and Development Division."
ER  -