1955. First Edition. 284 pages. No dust jacket. Blue and black paper illustrative boards with black and white lettering to spine and front. Black and white diagrams throughout. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Annotations and marginalia to some pages throughout. Boards have mild edge wear with slight rubbing to surfaces. There is bumping to corners and crushing to spine ends. Tanning to spine and edges.