1. Undescended testicle and hypospadias;Campbell;Amer. J. Surg.,1951
2. Anomalies of the genital tract;Campbell,1970
3. Study of the incidence of hypospadias in Rochester, Minnesota, 1940–1970, and a case-control comparison of possible etiologic factors;Sweet;Mayo Clin. Proa,1974
4. Incidence of testicular pathology;Baumrucker;Bull. U. S. Army Med. Dept.,1946
5. Congenital Deformities of the Testis and Epididymis;Scorer,1972