No Edition Remarks. 80 pages. No dust jacket. Green cloth boards with gilt lettering. Contains black and white illustrations and folded diagrams. Folded Nomogram chart in rear pocket. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pen inscription and pencil markings to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Moderate sunning to spine and edges with crushing to spine ends. Visible wear marks to boards. Boards are warped.