TY  - BOOK
AU  - Estolas, Josefina V.
AU  - Salvador, Samuel M.,;Villaleva, Zenaida S.,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1989///;©198946
CY  - Manila, Philippines :;Manila, Philippines
PB  - National Bookstore,;National Book Store
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Marketing research
KW  - sears0
N1  - Bibliography : p. 382; 5
ER  -