Francois De Callatay Books

Greek and Roman coins from the Du Chastel Collection

By Francois De Callatay

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Cleopatre usages et mesusages de son image

By Francois De Callatay

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"Ah que ne l'eut-elle eu plus long, plus court, plus mignon! La face du monde en eùt été changée, disait Blaise Pascal. En vérité, ce qui a changé, ce n'est pas la face du monde mais son visage à e...

TYPOI

By Richard Veymiers, Panagiotis P. Iossif, Francois De Callatay

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Since the 16th c. numerous studies have been consecrated to the images depicted on Greek and Roman coins. Most of them are concerned with the identification of numismatic types. In contrast, rare a...

Le nombre et la chair

By Francois De Callatay

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Les Titradrachmes Dorodhs II Et de Phraate IV. Etude Du Rythme de Leur Production Monitaire La Lumihre Dune Grande Trouvaille Studia Iranica

By Francois De Callatay

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Inestimables richesses de l histoire

By Michel Bendenoun

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Quantifications et numismatique antique

By Francois De Callatay

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Les Mots et les Monnaies

By Francois De Callatay, Judith A. Penna

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Numismatic Antiquarianism Through Correspondence

By Francois De Callatay, Ute Wartenberg

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Quantifying monetary supplies in Greco Roman times

By Francois De Callatay

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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.