1963. 4th Edition Revised & Reset. 87 pages. This is an ex-Library book. Pictorial dust jacket over blue and white cloth with decorations. Expected library inserts, stamps and inscriptions. Black and white illustrations and photographs throughout. Binding remains firm. Pages and illustrations have light tanning and foxing throughout. Water staining to pastedowns. Boards have light shelf-wear with corner bumping. Very slight crushing to spine ends. Light wear marks overall. Clipped jacket has light edgewear with chips and creasing. Wear marks overall.