1962. 4th edition. 62 pages. Pictorial dust jacket over green cloth. Contains black and white illustrations. Well bound and clean pages, with mild tanning to text block edges. Front endpaper is missing. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Boards are slightly bowed. Unclipped jacket has light edge-wear with minor tears and chipping. Moderate tanning and creasing, with rubbing and marking.