1948. Third Edition Revised. 164 pages. Brown dust jacket over brown cloth. Contains black and white photographic plates. Pages and plates are lightly tanned and foxed throughout. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Moderate foxing to spine. Unclipped jacket has moderate edge wear with chips, tears and creasing. Light tanning to spine and edges. Light marking to surfaces.