Evaluation a systematic approach

Manylion Llyfryddiaeth
Prif Awdur:	Rossi, Peter Henry 1921-
Awduron Eraill:	Freeman, Howard E., Rosenbaum, Sonia
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	Beverly Hills, Calif. Sage Publications c1982.
Rhifyn:	2nd ed.
Pynciau:	Evaluation research (Social action programs) Evaluation Studies as Topic.