Rolf Zillmer Books

Bryce Canyon National Park (Parks for People Series)
Bryce Canyon National Park (Parks for People Series)

By Rolf Zillmer, Ed Radlauer, Ruth Radlauer

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Describes the history, sights, and facilities of Bryce Canyon National Park in Utah.

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Shenandoah National Park
Shenandoah National Park

By Ruth Radlauer

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Presents the geography, plant and animal life, and distinctive features of this national park in the state of Virginia.

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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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