Michael P. Conzen Books

The Illinois and Michigan Canal National Heritage Corridor
The Illinois and Michigan Canal National Heritage Corridor

By Michael P. Conzen

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This vol. is primarily a bibliography of sources about the canal that runs from Chicago to LaSalle, Ill. Historical information is included.

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Focus on Ottawa
Focus on Ottawa

By Michael P. Conzen

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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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