1960. Fifteenth edition. 393 pages. Blue dust jacket over blue cloth. Contains black and white diagrams. 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 light marking and sunning. Clipped jacket has moderate edge wear with some prominent tears and chipping. Mild tanning and marking.