1. The incidence of side effects with oral or intrauterine contraceptives;Goldzieher;Am J Obstet Gynecol,1968
2. A clinical appraisal of patients following long-term contraception;Keifer;Am J Obstet Gynecol,1975
3. A comparison of the symptoms associated with the use of three oral contraceptives: a double-blind crossover study of Ovral, Norinyl, and Norlestrin;Ravenholt;Adv Plann Parenth,1978
4. Methodology of evaluating side effects: norgestrel 0.5 mg and ethinyl estradiol 0.05 mg;Statzer;Adv Plann Parenth,1969