1959. Third Edition, Revised, Enlarged. 169 pages. Blue dust jacket over blue cloth boards with black lettering to spine. Binding remains firm. Crinkling to pages at gutters. Pages remain bright and clear with minimal tanning. Boards have mild edge wear with slight rubbing to surfaces. Crushing to spine ends. Tanning to spine and edges. Lettering is bright and clear. Boards are bowed. Book has a slight forward lean. Unclipped jacket has light edge wear with minor tears and chipping. Mild rubbing and marking. Tanning to spine and edges.