TY  - BOOK
AU  - Leeflang P H S
TI  - Methamitical models in marketings :  A survey the stage of development some extensions and applications
U1  - X:51:(B), L4-;1 
PY  - 1974///
CY  - Eiden
PB  - H E Stenfert Kroses B V  
KW  - ECONOMICS
ER  -