By Shern D.L.   Trochim W.M.K.   LaComb C.A.   in Evaluation and Program Planning

ISSN:0149-7189|18|2|143-153

Elsevier‎(1995)‎

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By Ayoub I.A.   T. J.Y.   Coen A.S.   Patrick D.C.   Shern D.L.   in Evaluation and Program Planning

ISSN:0149-7189|19|4|309-319

Elsevier‎(1996)‎

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