TY  - BOOK
AU  - Katz,Lilian
AU  - Evangelou,Demetra
AU  - Hartman,Jeanette Allison
ED  - National Association for the Education of Young Children.
TI  - The case for mixed-age grouping in early education / 
T2  -  NAEYC ; 
SN  - 0935989315
AV  - LB3061  K38 1990
PY  - 1990///
CY  - Washington, D.C. : 
PB  -  National Association for the Education of Young Children, 
KW  - Agrupación por aptitudes de los escolares
KW  - lemb
KW  - Educación temprana en la niñéz
ER  -