The Abacus: A Pocket Computer by Jesse Dilson
1968. No Edition Remarks. 143 pages. Pictorial paper covers. Pages are bright and clear with light foxing and tanning to text block edges and reverse of covers. Hinges are lightly cracked and stained but covers remain firmly attached. Paper covers have light edge-wear and corner curling with mild tanning and scuffing overall. Spine has minor sunning, rolling and creasing.