1970. Fifth Edition with Amendments. 110 pages. No dust jacket. Blue cloth with gilt lettering. Additional notes booklet to in pocket at rear pastedown. Pages remain bright and clear. Binding remains firm. Pencil inscription to front pastedown and endpaper. Mild tanning and foxing to endpapers. Staple rust markings to rear endpaper. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Moderate scratching and marking to boards, including pen marks and notable stain to upper corner of front board. Mild tanning to spine, which has mild crushing and wear to ends. Small dent to upper and lower edge of rear board.