Johannes Gebhardt Books

Apparitio Sacri Occultatio Operis

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"In italienischen und spanischen Kirchen des 17. Jahrhunderts war es an bestimmten Festtagen gängige Praxis, Kultbilder mithilfe versenkbarer Altargemälde im Rahmen ritueller Enthüllungszeremonien...

Paragone Leonardo in Comparison

By Johannes Gebhardt, Frank Zollner

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Re thinking re making re living Christian origins

By Elisabetta Scirocco, Manuela Gianandrea, Ivan Foletti, S. Romano

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.