Petra Press Books

A multicultural portrait of immigration
A multicultural portrait of immigration

By Petra Press

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Presents the history of immigration to the United States from around the world beginning with the Indians.

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Mexican Americans
Mexican Americans

By Petra Press

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Indians of the Northwest
Indians of the Northwest

By Petra Press

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Indians of the Northwest
Indians of the Northwest

By Petra Press, Lisa Sita

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This book presents an overview of the history of the Indians of the Northwest and its inhabitants.

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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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