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Amazon.com : Stillman & Birn Zeta Series Wirebound Sketchbook, 7" x 10", 270 GSM (Extra Heavyweight), White Paper, Smooth Surface : Drawing Pads And Books : Office Products
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Amazon.com: Stillman & Birn Zeta Series Hardbound Sketchbook, A4 (8.25" x 11.75"), 270 GSM (Extra Heavyweight), White Paper, Smooth Surface : Arts, Crafts & Sewing
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