Recent Advances in Objective Refraction by L.A. Swann
1939. No Edition Remarks. 87 pages. No dust jacket. Green cloth. Contains black and white in-text illustrations. Pages are lightly tanned and foxed throughout. Cracking to gutters of a few pages with exposed binding. Occasional thumb-marking present. Binding remains firm. Boards have mild edge wear with dark rubbing to surfaces. Soft crushing to spine ends. Mild tanning to spine and edges. Scuffing and dark marking overall. Some water staining to bottom edge causing slight discolouration to cloth.