Della Dumbaugh Books

Century of Advancing Mathematics

By Donald J. Albers, Stephen F. Kennedy, Gerald L. Alexanderson, Della Dumbaugh, Frank A. Faris

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Count Me In

By Deanna Haunsperger, Della Dumbaugh, Mathematical Association Of America

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Emil Artin and beyond

By Della Dumbaugh

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This book explores the development of number theory, and class field theory in particular, as it passed through the hands of Emil Artin, Claude Chevalley and Robert Langlands in the middle of the t...

Emil Artin and beyond

By Della Dumbaugh

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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.