Joan E. Rahn Books

More plants that changed history
More plants that changed history

By Joan Elma Rahn

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Discusses the influence papyrus and paper, rubber growing, and the tea and opium trade have had on the relationships between nations.

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Botany
Botany

By Joan E. Rahn

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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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