1966. 146 pages. This is an ex-Library book. Pictorial paper jacket over grey cloth. Expected library inserts, stamps and inscriptions. Contains black and white diagrams and tables throughout. Pages remain bright and clear throughout. Crushed spine, moderate edge wear to joints. Boards have mild shelf wear with light rubbing and corner bumping. Unclipped jacket showing original price Jacket is in good condition, no tears, rubbing or edge wear.