[The golden year of the silver ring: Ernst Grafenberg and his ring (author's transl)].
Thomsen
R J
RJ
D003267:Contraception; D004467:Economics; D005193:Family Planning Services; D007434:Intrauterine Devices; D012106:Research; D013672:Technology
Contraception; Contraceptive Methods--history; Economic Factors; Family Planning; Iud, Unmedicated--history; Iud--history; Research And Development--history; Technology