1962. Sixth Edition. 204 pages. No dust jacket. Brown cloth, with black lettering. Contains black and white illustrations. Pages are bright and clear, with annotations and occasional thumbing throughout. Mild tanning to text block edges. Some foxing and inscriptions to front endpaper, with minimal thumbing to front pastedown. Boards have mild shelf wear with light rubbing and corner bumping. Some light marking and sunning. Book has noticeable forward lean.