1964. No Edition Remarks. 368 pages. No dust jacket. Decorated grey cloth. Volume 11, Scientists and Inventors. Contains colour in-text illustrations and plates. Pages and plates are lightly tanned and foxed throughout. Occasional thumb-marking present. Binding remains firm. Boards have mild edge wear with slight rubbing to surfaces. Soft crushing to spine ends. Mild tanning to spine and edges. Some rubbed dark marking overall.