1954. First Edition. 139 pages. White dust jacket over blue cloth boards. Contains black and white illustrations and diagrams. Ex-library copy with expected inserts, stamps and inscriptions. Pages remain bright and illustrations and diagrams clear. Moderate tanning to title page. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and crushing at spine ends. Unclipped jacket has moderate edge wear with large tear down side of spine and chipping. Mild rubbing and tanning.