1. Injectable contraceptives;Toppozada;Contracept Deliv Sys,1982
2. Contraceptive requirements and demand for contraceptive commodities in developing countries in the 1990s;United Nations Population Fund,1991
3. Once-a-month injectable contraceptives;Hall;IPPF Med Bull,1987
4. Long acting progestins. Promise and prospects;Liskin;Population Reports,1983
5. Conception control by long-acting progestogens: Preliminary report;Siegel;Obstet Gynecol,1963