1964. First Edition. 127 pages. No dust jacket. This is an ex-Library book. Pictorial cloth covered boards. Black and white diagrams throughout. Ex library copy with associated labels, inserts, stamps and annotations. Pages remain bright and clean with minimal tanning and foxing. Binding remains firm. Slight thumb marking in places. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces heavily tanned. Boards are slightly bowed. Book has slight forward lean.