1956. First Edition. 120 pages. Pictorial dust jacket over pictorial cloth covered boards. Black and white photographs and diagrams. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Dedication to front free endpaper. Boards have light shelf wear with minor corner bumping and crushing to spine ends. Clipped jacket has heavy wear with tears, chipping and creasing. Some rubbing and marking to surfaces.