1954. Second impression. 264 pages. Pictorial dust jacket over pictorial paper covered boards. Black and white diagrams throughout. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and tearing to spine ends. All surfaces tanned and sunned, particularly spine. Unclipped jacket has light edge wear with minor tears, chipping and creasing. Some rubbing and marking to surfaces.