title: Classic pages in obstetrics and gynecology. Anatomical variations in the female pelvis and their effect in labor with a suggested classification. William Edgar Caldwell and Howard Carmen Moloy. American Journal of Obstetrics and Gynecology, vol. 26, pp. 479-505, 1933.
mesh_terms: D002965:Classification; D005260:Female; D049673:History, 20th Century; D006801:Humans; D007743:Labor, Obstetric; D009518:New York; D009774:Obstetrics / Q000266:history*; D010388:Pelvis / Q000033:anatomy & histology*; D011247:Pregnancy