1960. First Edition. 192 pages. Pictorial dust jacket over blue cloth. Black and white photographs and diagrams. Presentation plate on front free endpaper. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. Some insect damage to edge of front board. Boards are slightly bowed. Clipped jacket has heavy wear with tears, chipping and creasing.