TY  - RPRT
TI  - Postcoital contraception.
AU  - J Porter
AU  - W Jones
PY  - 1981
DO  - 10.5694/j.1326-5377.1981.tb135322.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7231250/
ID  - 7231250
ER  -