Donald L. Deffner Books

The Possible Years
The Possible Years

By Donald L. Deffner

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Bold ones on campus
Bold ones on campus

By Donald L. Deffner

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At life's end
At life's end

By Donald L. Deffner

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You promised me, God!
You promised me, God!

By Donald L. Deffner

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I hear two voices
I hear two voices

By Donald L. Deffner

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Voices & choices
Voices & choices

By Donald L. Deffner

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Please change me, God!
Please change me, God!

By Donald L. Deffner

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The compassionate mind
The compassionate mind

By Donald L. Deffner

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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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