1972. No Edition Remarks. 195 pages. No dust jacket. This is an ex-Library book. Green cloth with gilt lettering to spine. Black and white graphs throughout. Pages remain bright and clear. Binding is firm. Mild marking to endpapers, with library stamp to front free endpaper. Boards and spine have minimal shelf-wear, with mild corner bumping and crushing to ends. Gilt remains bright. Light rubbing and scuffing overall.