TY  - BOOK
AU  - Rossi,Peter H.(Peter Henry),1921-
AU  - Freeman,Howard E.
TI  - Evaluation: a systematic approach 
SN  - 0803944586
PY  - 1993///
CY  - Newbury Park
PB  - SAGE Publications
KW  - Evaluation research (Social action programs)
N1  - Bibliography: p. 456-474
ER  -