1966. No Edition Remarks. 95 pages. No dust jacket. This is an ex-Library book. Blue cloth with gilt lettering to spine. Black and white graphs throughout. Book has been rebound by library, with expected inserts, stamps and inscriptions. Pages remain bright and clear. Binding is firm. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Gilt remains bright. A few noticeable marks overall. Tape remnants to tail of spine and surrounding boards.