RT Book T1 Injectable hormonal contraceptives: technical and safety aspects T2 WHO offset publication JF WHO offset publication LA English PP Geneva PB World Health Organization YR 1982 UL https://krimdok.uni-tuebingen.de/Record/1611934001 NO Includes bibliographical references CN RG137.6.M43I54 1982 SN 9241700653 K1 Medroxyprogesterone K1 Norethindrone K1 Contraceptive drugs, Injectable