TY  - BOOK
AU  - Yates,Alfred
TI  - The organization of schooling: a study of educational grouping practices 
SN  - 0710070470
PY  - 1971///
CY  - London
PB  - Routledge & Kegan Paul
KW  - Group work in education
N1  - Bibliography: p. 97-104
ER  -