Gene S. Helfman Books

The diversity of fishes
The diversity of fishes

By Gene S. Helfman

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Fishes
Fishes

By Gene S. Helfman

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Sharks
Sharks

By Gene S. Helfman

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Fish Conservation
Fish Conservation

By Gene S. Helfman

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Fish Conservation
Fish Conservation

By Gene S. Helfman

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The diversity of fishes
The diversity of fishes

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Sharks
Sharks

By Gene Helfman, George H. Burgess

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Fishes
Fishes

By Bruce Collette, Gene Helfman

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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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