1971. Sixth Printing. 165 pages. Pictorial dust jacket over green cloth. Contains black and white in-text illustrations. Pages are lightly tanned and foxed throughout. Light thumb-marking present. Previous owner's inscription to front free endpaper. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Light tanning to spine and edges. Unclipped jacket has light edge wear with chips, tears and creasing. Rubbed marking to surfaces, with water staining to front panel. Mild tanning to spine and edges.