Effective evaluation :
Guba, Egon G.
Effective evaluation : improving the usefulness of evaluation results through responsive and naturalistic approaches / Egon G. Guba - p.
0875894933
AZ 191 .G 8 1981
Effective evaluation : improving the usefulness of evaluation results through responsive and naturalistic approaches / Egon G. Guba - p.
0875894933
AZ 191 .G 8 1981