TY  - BOOK
AU  - Judd, Charles and  Kenny , David A.
TI  - Estimating the effects of social interventions
AV  - H 62.5 .U5J83 1981 
PY  - 1981///
CY  - Cambridge
PB  - Cambridge university press
KW  - 1. social science research-- Unites states 2. Evaluation research( social action programs)-- United states
ER  -