TY  - BOOK
AU  - Johnson,David W.
AU  - Johnson,Roger T.
AU  - Holubec,Edythe J.
TI  - The new circles of learning: coperation in the classroom and school
SN  - 0871202271
PY  - 1994///
CY  - Washington
PB  - Association for Supervision and Curriculum Development
KW  - Group work in education
KW  - Cooperation
KW  - Study and teaching
N1  - p. 106-110
ER  -