1970. Eighth edition. 26 pages. Paperback book with pictorial cover. Black and white photographs and diagrams. Fold-out pattern at rear. Pages and binding are presentable with no major defects. Minor issues present such as mild cracking, inscriptions, inserts, light foxing, tanning and thumb marking. Overall a good condition item. Paper cover has mild edge-wear with light rubbing and creasing. Some light marking and tanning.