1966. Fourth Edition. 188 pages. Pictorial dust jacket over grey cloth. Black and white illustrated and photographic plates throughout. Binding remains firm. Pages and plates are lightly tanned throughout. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Light tanning to edges. Book has slight forward lean. Unclipped jacket has light edgewear with chips and creasing. Light tanning to edges. Wear marks overall.