TY  - BOOK
ED  - American Mangement Association
TI  - Maintainging the product portfolio: the commerical development concept
U1  - 658.57 
PY  - 1960///
CY  - NewYork
PB  - American Mangement Association
KW  - New products
KW  - Management
KW  - Marketing research
KW  - Commerical development
N1  - Based mainly on presentations at 1989-60 conference of AMA's Research and Development Division
ER  -