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Observational studies / Paul R. Rosenbaum.
- 519.53 R8133 2002
- Rosenbaum, Paul R.,
- Springer,
- [2002] ©2002
- New York :
-
Observational studies / Paul R. Rosenbaum.
- 001.42 R8133
- Rosenbaum, Paul R.,
- Springer-Verlag,
- New York :