TY  - BOOK
AU  - Hagel,John
AU  - Armstrong,Arthur
TI  - Net gain: expanding markets through virtual communities 
SN  - 0875847595 (hbk.)
PY  - 1997///
CY  - Boston
PB  - Harvard Business School Press
KW  - Internet marketing
KW  - Customer relations
KW  - Virtual communities
N1  - Includes index; Includes bibliographical references
ER  -