Charles-Marie Widor Books

J. S. Bach

By Charles-Marie Widor, Albert Schweitzer, Ernest Newman

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Independent of his international renown as a humanitarian, Albert Schweitzer is well known as a great musicologist; a reputation that rests largely upon this book. Schweitzer's J. S. Bach is one...

J. S. Bach Volume 2

By Albert Schweitzer

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Toccatas Carillons and Scherzos for Organ

By Rollin Smith

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Volume 1 Preludes and Fugues Youthful Period

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Widor Symphony No. 6 Organ Kalmus Edition

By Charles M. Widor

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Widor Symphony No.5 Organ Kalmus Edition

By Charles M. Widor

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Widor Symphony Romane Op.73 Kalmus Edition

By Charles M. Widor

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Volume 4 Preludes and Fugues Mature Master Period Part 2

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Volume 3 Preludes and Fugues Mature Master Period Part 1

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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.