1. Long-acting steroidal contraceptive systems;Beck;Res. Frontiers Fertil. Regul,1980
2. New long-acting injectable microcapsule contraceptive system;Beck;Am. J. Obstet. Gynecol,1979
3. Systemic and local delivery of contraceptive steroids using biodegradable microcapsules;Beck,1979
4. Evaluation of a new three-month injectable contraceptive microsphere system in primates (baboon);Beck;J. Contracep. Del. Systems,1980
5. Absorption of antibodies from the baboon vagina;Beck;Biol. Reprod,1975