1955. Seventh Edition; Revised. 936 pages. No dust jacket. Green cloth. Clean pages with mild tanning and notable foxing throughout. Tightly bound with mild thumb-marking throughout. Mild droplet staining to text block edges. Boards have light edgewear with corner crushing and notable marking to boards. Mild tanning to spine, which has mild crushing to ends. Moderate water stains to spine. Book has forward lean.