Walter Lefferts Books

Nations of the world
Nations of the world

By Walter Lefferts

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Nations of the world
Nations of the world

By John Jarolimek

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America today and yesterday
America today and yesterday

By Walter Lefferts

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A social studies textbook discussing life in United States cities and towns, on Indian reservations, and in several new cities throughout the world.

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The Old world
The Old world

By Walter Lefferts

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The Old World 6th Grade
The Old World 6th Grade

By Macmillan

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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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