Jens Gregersen Books

Sexual Selection And The Barn Swallow

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Overvagning af skarver 1989

By Jens Gregersen

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Klar blaa luft let bris fra n

By Malene Linell Ipsen, Jens Gregersen, Theis Vallo Madsen, Johannes Larsen

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Johannes Larsen (1867-1961) hører til blandt hovedskikkelserne i malergruppen Fynboerne og har i kraft af sin sans for at formidle naturen i et kunstnerisk udtryk opnået en saerlig position i dansk...

Tipperne

By Jens Gregersen

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Frem for alt frihed

By Jens Gregersen, Lars Hedegaard

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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.