1968. 7th edition. 126 pages. No dust jacket. Grey cloth with lettering. Contains black and white illustrations. Moderate tanning, with light foxing and marking to pages. Some rub-marking and tanning to pastedowns and endpapers with inscriptions to front. Boards have moderate shelf wear, with rubbing and marking. Light bumping to corners and crushing to spine ends. Book has noticeable forward lean, with tanning overall.