1956. 6th Edition revised reprint. 491 pages. No dust jacket. Brown cloth. Black and white photographs throughout. Slight cracking to hinges, with exposed netting, pages remain attached. Pages and photographs are lightly tanned throughout. Stains and markings to some pages. Previous owner's inscription to front pastedown. Stamp to text block edges. Boards have light shelf-wear with corner bumping. Dents to front board.