Carl Johanson Books

All Kinds of Cars

By Carl Johanson

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All kinds of planes

By Carl Johanson

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Welcome to the wacky world of planes from fighter jets to hot air balloons and hang gliders, there s just about every kind of air transportation you can imagine flying, both real and imaginary.

Cotxes de tota mena

By Carl Johanson, Marta Armengol Royo

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Ovarian cells in superfusion

By Carl Johanson

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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.