Robbins, H., & Zhang, C. H. (1988). Estimating a treatment effect under biased sampling.
Citação norma ChicagoRobbins, H., and C H. Zhang. Estimating a Treatment Effect Under Biased Sampling. 1988.
MLA citiranjeRobbins, H., and C H. Zhang. Estimating a Treatment Effect Under Biased Sampling. 1988.
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