The Helicopter: Mechanics of Flight by J. Heurtaux
1976. No Edition Remarks. 175 pages. Illustrated dust jacket over brown cloth covered boards with gilt. Pages remain clear with minimal tanning and foxing. Minor pencil marking to front free end-paper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Mild crushing to spine ends. Minor fraying to cloth at spine ends. Gilt lettering is bright and clear. Unclipped jacket has moderate edge-wear with tears and creasing.