Tennekoon, K H2009-05-282009-05-281994-12-01Tennekoon KH. Immunocontraceptives. The Ceylon Medical Journal. 1994 Dec; 39(4): 157-60http://imsear.searo.who.int/handle/123456789/47229The Ceylon Medical Journal.engChorionic Gonadotropin --immunologyContraception, ImmunologicHumansVaccines --chemical synthesisJournal Article