1968. 4th Edition, Revised. 266 pages. No dust jacket. Pictorial paper covered boards. Black and white maps throughout. Binding remains firm. Pages and maps have light tanning and foxing throughout. Pencil inscriptions to front pastedown and endpaper. Boards have moderate shelf-wear with bumping to corners and rubbing to surfaces. Light tanning to spine and edges with crushing to spine ends. Staining overall.