1968. First Edition. 222 pages. Pictorial dust jacket over brown cloth. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Some underlining and marginalia. A previous owner's name to front free endpaper. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces mildly tanned. Unclipped jacket has heavy edge wear with large tears, chipping and creasing. Some tanning and foxing to all surfaces, particularly to spine. Some rubbing and marking.