1. The FPA in the USA;Smith, M.;J Fam Plann Doctors,1977
2. The pill off prescription;Anonymous;J Fam Plann Doctors,1977
3. Post-coital contraception by a copper-containing IUD;Monks, I.M.;J Fam Plann Doctors,1977
4. Postcoital hormonal contraception: uses, risks, and abuses;Yuzpe, A.A.;Int J Gynaecol Obstet,1977
5. The biological activities of norgestrel and its enantiomers;Jones, R.C.; Singer, A.C.; Edgren, R.A.;Int J Fertil,1979