Sally M. Walker Books

Put Levers to the Test
Put Levers to the Test

By Sally M. Walker

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Put Pulleys to the Test
Put Pulleys to the Test

By Sally M. Walker

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Put Screws to the Test
Put Screws to the Test

By Sally M. Walker

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Wedges
Wedges

By Sally M. Walker

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Ghost walls
Ghost walls

By Sally M. Walker

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Award-winning author Sally M. Walker brings colonial American history to life through the discovery of an important homestead in seventeenth century Maryland. She follows the painstaking work of sc...

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The Vowel Family
The Vowel Family

By Sally M. Walker

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Investigating heat
Investigating heat

By Sally M. Walker

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Investigating light
Investigating light

By Sally M. Walker

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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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