1971. No Edition Remarks. 106 pages. No dust jacket. Black cloth with plastic photographic front board. Black and white diagrams and photographs throughout. Pages are lightly tanned and foxed, but text remains clear. Binding is firm. Boards and spine have minimal shelf-wear, with minor corner bumping and crushing to ends. Light rubbing and scuffing to rear board, with some other noticeable marks. Small brown marks to front board and spine.