TY  - BOOK
AU  - Harden, Leland
AU  - Heyman, Bob
TI  - Marketing by the numbers: how to measure and improve the ROI of any campaign
SN  - 9780814416204
U1  - 658.802 H2M2 
PY  - 2010///
CY  - New York
PB  - AMACOM (American Management Association)
KW  - Internet Marketing
ER  -