1965. New edition. 332 pages. No dust jacket. This is an ex-Library book. Brown cloth covered boards with gilt. Black and white diagrams. Ex library copy with associated labels, inserts, stamps and annotations. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Minor inscriptions to endpapers. Boards have light shelf wear with minor corner bumping and crushing to spine ends. All surfaces tanned and sunned, particularly spine.