1967. Revised Edition. 247 pages. Pictorial jacket over red paper covered boards. Various illustrations, photographs and diagrams throughout, some to plates, in both colour and black and white. Photographic endpapers. Pages and plates remain bright and clear, with light tanning to edges. Binding is firm. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Unclipped jacket. Minor tanning to all surfaces. Light edgewear with slight chipping and tiny sections of loss to spine.