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Validity issues in evaluative research / edited by Ilene N. Bernstein. - Beverly Hills, Calif. : Sage Publications, 1976, c1975. - 134 p. : graphs ; 22 cm. - Sage contemporary social science issues ; 23 .

"Originally appeared as a special issue of Sociological methods & research (volume 4, number 1, August 1975)."

Includes bibliographies.

0803905815

75032373


Evaluation research (Social action programs)

H62 / .V27 1976

001.4

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