Causal inferences in nonexperimental research /
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Chapel Hill :
University of North Carolina Press,
c1964.
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| Item Description: | Includes bibliographical references and index. |
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| Physical Description: | xii, 200 p. : ill. ; 21 cm. |
| ISBN: | 0807809179 |