TY  - BOOK
TI  - Evaluation research methods : : A basic guide / 
SN  - 0-8039-0907-1
U1  - 300.18 EVA 
PY  - 1977///
CY  - California : 
PB  - SAGE publications, 
KW  - Evaluation research(social action programs)-addresses, essays,lectures
ER  -