Norplant contraceptive subdermal implantation : managerial and te chnical guidelines. - Geneva : World Health Organization, 1990. - vi, 134 p. : ill. ; 24 cm. On cover: "Provisonal version" Subjects--Topical Terms: Norgestrel.Contraceptive drug implants.Birth control. Dewey Class. No.: 613.9432 NOR