R. Gwinn Vivian Books

Chaco Hohokam
Chaco Hohokam

By Patricia L. Crown

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Chaco Handbook
Chaco Handbook

By R. Gwinn Vivian, Bruce Hilpert

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Chaco Canyon
Chaco Canyon

By R. Gwinn Vivian

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Relates the nineteenth-century discovery of cliff dwellings in the Chaco Canyon of northwest New Mexico, the excavations of the ancient ruins, and what the artifacts reveal about the civilization o...

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The Chaco handbook
The Chaco handbook

By R. Gwinn Vivian

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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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