1969. Third Edition. 139 pages. No dust jacket. This is an ex-Library book. Green cloth. Expected library inserts, stamps and inscriptions. Pages remain bright and clear with minimal tanning and foxing. Thumb-marking present. Light creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Soft crushing to spine ends. Visible tanning to spine and edges. Some black marks to boards.