1956. Second Edition. 171 pages. Illustrated dust jacket over green cloth boards. Gilt lettering. Contains black and white illustrations. Contains information supplement. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen markings to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is bright and clear. Unclipped jacket. Panels and spine have moderate edgewear with chips, tears and creases. Moderate loss to spine and edges. Minor wear marks to spine and panels.