TY  - BOOK
AU  - Stahl, Gerry.
TI  - Group cognition: computer support for building collaborative kno wledge 
SN  - 0262195399
U1  - 371.334 
PY  - 2006///
CY  - Cambridge
PB  - The MIT Press
KW  - Computer assisted instruction
KW  - Computer networks
N1  - Includes bibliographies
ER  -