1975. Sixteenth Edition. 1308 pages. Yellow dust jacket over light brown cloth with photographic black and white in text images and black and white illustrations throughout. Minor tanning to pages with heavier tanning to pastedowns and endpapers. Pen inscriptions to front endpaper and binding is loose. Both hinges are cracked with exposed netting and cracks to guttering with exposed netting. Moderate tanning to text block edges. Boards have visible rubbing and minor bumping to corners. Fair crushing to spine ends and book is forward leaning. Unclipped jacket with visible edge wear, creasing and rubbing. Splitting to joints and visible tearing to corners, edges and spine ends. Noticeable ink marks to interior.