1954. First Edition. 96 pages. Pictorial dust jacket over green cloth. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned, particularly spine. Clipped jacket has heavy wear with tears, chipping and creasing. All surfaces heavily tanned, particularly spine.