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2
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Ecological inference / Laura Irwin Langbein, Allan J. Lichtman.
- 300.727 L2719
- Langbein, Laura Irwin,
- Sage Publications,
- [1978] ©1978
- Beverly Hills, Calif. :
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Discovering whether programs work : a guide to statistical methods for program evaluation / Laura Irwin Langbein.
- 361.60727 L2719
- Langbein, Laura Irwin,
- Goodyear Publishing Company, Inc.,
- [1980] ©1980
- Santa Monica, California :