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Explains the counting systems of the ancient Egyptians, Babylonians, Mayans, Greeks, and Hindus, describes the operation of an abacus and a computer, and deciphers an imaginary Martian code
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Book Description Random House Childrens Books, 1975. Hardcover. Condition: New. Never used!. Seller Inventory # P110809831252
Book Description Random House Childrens Books, 1975. Condition: New. book. Seller Inventory # M0809831252
Book Description Condition: New. New. Seller Inventory # S-0809831252