1948. Reprinted. 172 pages. Pictorial dust jacket over blue cloth. Black and white diagrams throughout. Black and white fold-out charts in pocket at rear. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Some mild water staining. Previous owner's name to front pastedown. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Boards are slightly bowed. Unclipped jacket has heavy edge wear with large tears, chipping and creasing. All surfaces heavily tanned, particularly spine. Jacket in four pieces.