1961. First Edition. 326 pages. Pictorial dust jacket over pictorial paper covered boards. Black and white photographs and diagrams. Pages remain bright and clean. Binding remains firm. Minor pencil inscriptions to front free endpaper. Boards have moderate shelf wear with some bumping and fraying to corners and some tanning and marking. Unclipped jacket has heavy edge wear with tears, chipping and creasing. All surfaces heavily tanned, particularly spine.