TY  - BOOK
AU  - Rossi, Peter H.
AU  - Freeman, Howard E.
AU  - Lipsey, Mark W.
TI  - Evaluation: a systematic approach 
SN  - 0761908935 
U1  - 361.6´1072 
PY  - 1999///
CY  - Thousand Oaks, Calif.
PB  - Sage Publications
KW  - Investigación evaluativa (Programas de acción social)
UR  - http://www.loc.gov/catdir/enhancements/fy0656/98040244-d.html
UR  - http://www.loc.gov/catdir/enhancements/fy0656/98040244-t.html
UR  - http://www.loc.gov/catdir/enhancements/fy0734/98040244-b.html
ER  -