1961. Seventh Edition. 328 pages. Blue dust jacket over red cloth. Jacket is in plastic wrapper and has been taped to boards. Pages are lightly tanned and foxed throughout. Light thumb-marking present. Tape remnants with brown staining to endpapers. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Unclipped jacket has light edge wear with chips, tears and creasing. Jacket is in plastic wrapper. Mild sunning to spine and edges. Some tape staining to surfaces.