TY  - BOOK
AU  - Hagel,John
AU  - Armstrong,Arthur G.
TI  - Net gain: expanding markets through virtual communities 
SN  - 0875847595
PY  - 1999///
CY  - Boston, Mass.
PB  - Harvard Business School Press
UR  - http://www.archive.org/details/netgainexpanding00hage
UR  - http://www.openlibrary.org/books/OL1002295M
ER  -