1970. Revised Edition. 291 pages. This is an ex-Library book. Orange dust jacket with black lettering over orange cloth. Mild brown staining to pages on occasion. Minimal foxing and tanning to endpapers and page edges. Ex-library with usual stamps, inserts and markings. Mild wear to spine, board edges and corners, with scuffing and soiling to boards. Unclipped dust jacket. Mild wear and tear to edges and corners. Moderate tanning to spine and edges. Minor soiling to DJ.