1966. First Edition. 576 pages. No dust jacket. This is an ex-Library book. Green cloth covered boards. Black and white diagrams throughout. Ex library copy with associated labels, inserts, stamps and annotations. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned, particularly spine.