TY  - RPRT
TI  - Estimating causal effects from large data sets using propensity scores.
AU  - D B Rubin
PY  - 1997
DO  - 10.7326/0003-4819-127-8_part_2-199710151-00064
UR  - https://pubmed.ncbi.nlm.nih.gov/9382394/
ID  - 9382394
ER  -