SkillernR.: The Accessory Sinuses of the Nose. J. B. Lippincott, Co., Philadelphia. Second edition, p. 136, 1916.
2.
HajekM.: Nasal Accessory Sinuses. C. V. Mosby Co., St. Louis. Fifth edition, p. 178, 1926.
3.
RosedaleR. S.KoepfS. W.: Nontumorous Cysts of the Maxilla: Interesting Cases and Discussion. Annals of Otology, Rhinology and Laryngology, 46:652 (Sept.), 1937.