1964. 6th Printing. 539 pages. Pictorial dust jacket over blue cloth. Black and white illustrations throughout. Binding remains firm. Pages and illustrations are lightly tanned throughout. Water staining to top edge of text block. Boards have light shelf-wear with corner bumping. Slight crushing to spine ends. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Light tanning to spine and edges. Water staining to spine. Tape to all panels.