Optical Masers O. S. Heavens
1964. First Published. 103 pages. Grey dust jacket over blue cloth. Pages remain bright and clear with minimal tanning and foxing. Pencil inscription to front free endpaper. Some creasing to gutter. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces. Slight crushing to spine ends. Minor tanning to spine and edges. Unclipped jacket has moderate edgewear with chips, tears and creasing. Visible tanning to spine. Scuffing to edges.