1957. First Edition. 160 pages. No dust jacket. Green cloth covered boards with gilt. Black and white diagrams throughout. 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. Boards have mild shelf wear with light rubbing and corner bumping. Some moderate marking and tanning. Gilt lettering to spine is slightly dulled.