1950. 4th Edition, Revised. 108 pages. This is an ex-Library book. Grey dust jacket over red cloth. Library copy, with expected inserts and inscriptions. 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. Unclipped jacket has heavy edgewear with areas of loss, heavy tears, chips, and creasing. Light tanning to spine and edges. Water staining to spine.