TY  - BOOK
AU  - Thomas D. Cook
AU  - Laura C. Leviton
TI  - Foundations of program evaluation:theories of practice
U1  - 361.60684 SHA 22
PY  - 1991///
CY  - London
PB  - Sage Publication
KW  - Evaluation Research (social action program
N1  - includes bibliographical references and index
ER  -