TY  - BOOK
AU  - Posavac,Emil J.
AU  - Carey,Raymond G.
TI  - Program evaluation: methods and case studies 
SN  - 0136781292
PY  - 1992///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Evaluation research (Social action programs)
KW  - United States
N1  - p. 303-317
ER  -