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![Cover for Shadish, William R., Jr. · Foundations of Program Evaluation: Theories of Practice (Paperback Book) [Revised Ed. edition] (1993)](https://imusic.b-cdn.net/images/item/original/017/9780803953017.jpg?shadish-william-r-jr-1993-foundations-of-program-evaluation-theories-of-practice-paperback-book&class=scaled&v=1418027100)