Roland Lehoucq Books

La lumiere a la loupe

By Roland Lehoucq

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Ce documentaire expose les différentes propriétés et utilisations de la lumière, avec de multiples expériences.

La SF sous les feux de la science

By Roland Lehoucq

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D ou viennent les pouvoirs de Superman

By Roland Lehoucq

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Have you ever wondered about the origins of Superman's powers? With the help of recent discoveries and the current state of knowledge in physics, chemistry and physiology, Roland Lehoucq shows how...

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.