Quasi-experimental approaches; testing theory and evaluating policy /
| Main Author: | |
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| Other Authors: | , |
| Format: | Book |
| Language: | English |
| Published: |
Evanston, [Ill.] :
Northwestern University Press,
1973.
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| Subjects: |
| Physical Description: | xix, 368 pages : illustrations ; 24 cm. |
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| Bibliography: | Bibliography: pages [333]-361. |
| ISBN: | 0810104105 0810104199 (pbk.) |