TY  - BOOK
AU  - Sumner,Gerald C.
ED  - Research and Development Corporation,
TI  - Project R-3 allocation of students among groups.
T2  - The Rand paper series
PY  - 1971///
CY  - Santa Monica, California
PB  - Rand Corporation
KW  - Class size
KW  - School management and organization
ER  -