1952. Seventh Edition. 416 pages. Illustrated jacket over cloth. Pages and binding are presentable with minor defects. Some issues present such as mild cracking, inscriptions, inserts, moderate foxing, tanning and thumb marking. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Unclipped jacket has heavy edge-wear with some areas of loss, heavy tears, chips and creasing.