1. Sexual unfolding: Sexual Development and Sex Therapies in Late Adolescence;Sarrel,1979
2. Sequence, tempo and individual variation in the growth and development of boys and girls aged twelve to sixteen;Tanner;Daedalus,1971
3. Clinical Gynecologic Endocrinology and Infertility;Speroff,1973
4. Sexual Behavior in the Human Male;Kinsey,1948
5. Sexual Behavior in the Human Male;Kinsey,1948