William D. Schlaff Books

Reproductive Endocrinology and Infertility: The Requisites in Obstetrics & Gynecology

By Ruben Alvero, William D. Schlaff, Ruben Alvero MD FACOG FACS, William D. Schlaff MD

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This first volume in the new Requisites in Obstetrics and Gynecology Series thoroughly examines every aspect of reproductive endocrinology and infertility from normal menstrual cycle and pubertal d...

Decision-making in reproductive endocrinology

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Chronic Pelvic Pain

By Thierry G. Vancaillie, William L. Ledger, William Ledger, William D. Schlaff

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Chronic Pelvic Pain

By William Ledger, William D. Schlaff, Thierry G. Vancaillie

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Chronic Pelvic Pain

By Thierry G. Vancaillie, William L. Ledger, William Ledger, William D. Schlaff

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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.