Evaluation research methods for assessing program effectiveness.

Manylion Llyfryddiaeth
Prif Awdur:	Weiss, Carol H.
Fformat:	Llyfr
Iaith:	Saesneg
Cyhoeddwyd:	Englewood Cliffs, New Jersey Prentice-Hall c1972.
Pynciau:	Evaluation research (Social action programs) Evaluation Studies. Social Sciences.