TY  - BOOK
AU  - Karoly,Lynn A.;Greenwood,Peter W.;Everingham,Susan S.;Hoube,Jill;Kilburn,M.Rebecca
TI  - : What We Know and Don't Know About the Costs and Benefits of Early Childhood Interventions 
SN  - 9780833025302
PB  - RAND Corporation
KW  - Education
KW  - EDUCATION / General
UR  - www.jstor.org/stable/10.7249/mr898tcwf
ER  -