Irmeli Perho Books

Catalogue of Arabic Manuscripts

By Irmeli Perho

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Catalogue of Arabic Manuscripts

By Irmeli Perho

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The prophet's medicine

By Irmeli Perho

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Ibn Taghribirdi s portrayal of the first Mamluk rulers

By Irmeli Perho

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Catalogue of Persian Manuscripts

By Kongelige Bibliotek Denmark Staff, Irmeli Perho, Nordic Institute Of Asian Studies Staff

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This two-volume work describes three collections of Persian manuscripts and lithographic prints at the Royal Library, Copenhagen: 155 manuscripts and lithographs acquired by Arthur Christensen in I...

Catalogue of Persian Manuscripts

By Irmeli Perho

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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.