1971. Sixth Edition. 242 pages. Brown dust jacket with white lettering over brown cloth. B&W illustrations throughout. Clean pages. Minimal foxing and tanning to endpapers and page edges. Mild wear and bumping to spine, board edges and corners, with scuffing and soiling to boards. Unclipped dust jacket. Mild wear, tear and chipping to edges and corners, with some tape repair. Notable sunning to spine, with scuff to front. Minor soiling to DJ.