Percival, George Hector. An introduction to dermatology / by G.H. Percival. - 13th ed. - Edinburgh ; London : Edinburgh ; London : E. & S. Livingstone, 1967 [i. e. 1966] LCCN: 67075034 /SC Subjects--Topical Terms: Skin -- Diseases.--Skin -- Diseases. Dewey Class. No.: 616.5