Mary B. Campbell Books

Wonder & science
Wonder & science

By Mary B. Campbell

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"During the early modern period, western Europe was transformed by the proliferation of new worlds - geographic worlds found in the voyages of discovery as well as conceptual and celestial worlds o...

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Far-out facts
Far-out facts

By National Geographic Society U.S. . Special Publications Division

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Unusual facts about a wide range of topics including plants and animals, earth sciences, manners and customs, photography, and history. A poster-size calendar and a 24-page booklet of games and puz...

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Trouble
Trouble

By Mary Baine Campbell, Mary B. Campbell

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Wonder Science
Wonder Science

By Mary Baine Campbell

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Wonder and Science
Wonder and Science

By Mary Baine Campbell

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What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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