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Causal inferences in nonexperimental research / by Hubert M. Blalock, Jr.
- 300.15118 B637 1964
- Blalock, Hubert M.,
- University of North Carolina Press,
- [1964] ©1964
- Chapel Hill :
-
Causal inferences in nonexperimental research / by Hubert M. Blalock.
- 300.15118 B637 1972
- Blalock, Hubert M.,
- Norton Library,
- 1972. ©1964
- New York, NY :