1962. Fourth Edition Reprinted. 505 pages. Pictorial dust jacket over green cloth. Contains black and white in-text illustrations. Pages are lightly tanned and foxed throughout, heavier to endpapers. Tape staining to pastedowns. Occasional thumb-marking present. Binding is slightly shaky. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Light tanning to spine and edges. Unclipped jacket has moderate edge wear with chips, tears and creasing. Tape staining to inside flaps. Mild foxing to rear panel. Light tanning to spine and edges.