TY  - BOOK
AU  - Haddad Wadi D.
TI  - Educational effects of class size
T2  - World Bank Staff Working Papers. 280
U1  - "T:8, L8/UN" 
PY  - 1978///
CY  - Washington
PB  - World Bank U. S. A.   
KW  -  Education
KW  - Educational Management
ER  -