Gupta, D NKarkun, J N2009-05-282009-05-281976-05-01Gupta DN, Karkun JN. Antifertility effect of an intrafallopian tubal copper device. Indian Journal of Experimental Biology. 1976 May; 14(3): 316-9http://imsear.searo.who.int/handle/123456789/61400engAnimalsContraceptive Devices, FemaleCopper --pharmacologyDepression, ChemicalEmbryo Implantation --drug effectsFallopian TubesFemaleRabbitsJournal Article