Gwen Redvers Jones Books

Herio r Cestyll

By Malcolm Jones, Gwen Redvers Jones, Cyril Jones

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Broc Mor

By Gwen R. Jones

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Ots

By Diana Wynne Jones

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O r Lludw Corryn

By Gwen Redvers Jones, Michael Morpurgo

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Wrth y llyw

By Gwen Redvers Jones

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Diolch Sgrwff

By Gwen Redvers Jones

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Pst

By Gwen Redvers Jones

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Merlyn y Nos

By Gwen Redvers Jones

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Nofel hanesyddol sy'n mynd a ni nol i fyd y pyllau glo ganol yr ugeinfed ganrif gan adrodd stori Mathew Mowth Organ a Handel y merlyn sy'n gweithio yn y pwll.

Bai Pwy

By Gwen Redvers Jones

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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.