1933. First Edition. 240 pages. No dust jacket. Green cloth covered boards with gilt. Black and white diagrams. Maps across endpapers. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Minor pencil inscriptions to front free endpaper. Boards have heavy shelf wear with bumping and fraying to corners and crushing and fraying to spine ends. Some mild marks and staining to surfaces. Gilt lettering remains bright and clear. Boards are slightly bowed.