Jan Rydfors Books

Obstetrics, Gynecology and Infertility (7th Ed Desk Size and App Upload)

By Yona Tadir, Yasser El Sayed, John Chan, Dan Lebovic, Katherine Fuh, Elizabeth Langen, JOHN DAVID. GORDON, Jan Rydfors, Maurice Druzin

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Since 1990 this pocket handbook has been used by thousands of physicians, medical students, nurse midwives, nurses and other healthcare providers. Now in this completely rewritten and revised UPDAT...

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.