TY  - BOOK
AU  - Shadish,William R.,Jr
AU  - Cook,Thomas D.
AU  - Leviton,Laura C.
TI  - Foundations of program evaluation : theories of practice
AV  - H62 S522F
PY  - 1991///
CY  - Newbury Park, Calif.
PB  - Sage
KW  - EVALUTION RESEARCH (SOCIAL ACTION PROBLEMS)
ER  -