TY  - BOOK
AU  - Peter H Rossi
AU  -  Walter Williams, 
TI  - Evaluating Social Programs : Theory Practical and Politics
U1  - 301 
PY  - 1972///
CY  - New York
PB  - Seminar Press Inc
N1  - Peter H Rossi & Walter Williams: Evaluating Social Programs : Theory Practical and Politics.  New York.  Seminar Press Inc, 1972.--(301ROS)
ER  -