Skillern—Accessory sinuses of the nose. by ross hall skillern professer of laryngology medico‐chirurgical collage post graduate school, university of pennsylvania; late lieutenant colonal, M.C.U.S.A; fellow of American laryngological society; fellow of the american collage of surgeons; fellow of American laryngological rhinological and otological society; fellow of the New York academy of medicine etc., etc with 300 illustration cloth J.B. Lippomcott Co., Philladelphia publisher