TY  - BOOK
AU  - Leeflang, P. S. H.
TI  - Mathematical models in marketing: a survey, the stage of development, some extensions and applications
SN  - 9020704362
U1  - 350.7232095475 
PY  - 1974///
CY  - Leiden
PB  - Stenfert Kroese
KW  - Marketing
N1  - Includes Bibliographical references and index
ER  -