1966. Third edition, revised. 766 pages. No dust jacket. Blue cloth covered boards with gilt. Black and white diagrams throughout. Specimen exam papers in pocket at rear. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. A previous owner's name to front free endpaper. Boards have mild shelf wear with light rubbing and corner bumping. Some mild marking and tanning. Gilt lettering remains bright and clear.