9780809499502

• 978 — Country prefix (Bücher (ISBN))
• 080949950 — Manufacturer & product code
• 2 — Check digit (confirms the number is well-formed)

EAN-13 ✓ Valid check digit Registered in Bücher (ISBN)

• 9780809426775 — The Clipper Ships
• 9780809447800 — War On The Frontier (Civil War Series)
• 9780809425440 — Across The Rhine (World War Ii)

How Do Octopi Eat Pizza Pie? Pizza Math (I Love Math)

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