TY  - BOOK
AU  - Clarke,Alan
AU  - Dawson,Ruth
TI  - Evaluation research: an introduction to principles, methods, and practice 
SN  - 0761950958 (pbk.)
PY  - 1999///
CY  - London
PB  - SAGE
KW  - Evaluation research (Social action programs)
N1  - Includes bibliographical references and index
ER  -