Wolfgang Undorf Books

Catalogue of books printed in the 15th century in Swedish collections

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"The first major Swedish contribution to international incunabula research since the middle of the 20th century. Wolfgang Undorf revitalizes the seminal contributions by 19th century Swedish schola...

Schwedische Buchgeschichte

By Christopher B. Brown, Wolfgang Undorf, Gunter Frank, Otfried Czaika, Gordon Bruce

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From Gutenberg to Luther

By Wolfgang Undorf

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From Gutenberg to Luther

By Wolfgang Undorf

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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.