1956. No edition remarks. 285 pages. Dust jacket over blue cloth with gilt lettering to spine. Includes black and white graphs throughout. Pages remain bright with mild foxing throughout. Mild tanning band to end papers. Pencil inscriptions to front end paper. Moderate foxing to text block edges. Boards have light shelf-wear with small stain and faint scratching to front board. Moderate staining to rear board. Mild crushing to spine ends. Clipped jacket has light edgewear with tears and creasing, mainly to spine ends. Light rubbing and marking all over. Mild tanning all over. Notable marks to front board. Visible staining to rear.