Constance B. Schulz Books

Maryland, a history of its people

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An introductory high school textbook surveying the history of Maryland, with emphasis on the blacks, women, immigrants, and other special groups contributing to the variety of its population.

"It is no accident that the Southern Association for Women Historians enjoys the founding date of 1970. After extended and often bitter engagement with entrenched sexism in the decades following Wo...

A South Carolina Album 1936 1948

By Constance B. Schulz

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Master Guide to the American History Videodisc

By Constance B. Schulz

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Master Guide to the American History Videodisc

By Constance B. Schulz

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Maryland

By Constance B. Schulz, Gregory A. Stiverson, Edward C. Papenfuse, Jean B. Russo, Jean H. Baker, Suzanne Ellery Chapelle, Dean R. Esslinger

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Witness to the Fifties

By Constance B. Schulz, Steven W. Plattner, Clarke M. Thomas

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Careers for Students of History

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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.