Cally Oldershaw Books

Gemstones

By Cally Oldershaw

Average: 0.00, 0 Ratings

Gems of the World

By Cally Oldershaw

Average: 0.00, 0 Ratings

"Guide to the identification and properties of precious and semiprecious gems, novelty stones, agates and crystals. Includes the geology, chemistry of gemstones, what to look for when buying gems a...

Rocks and minerals

By Cally Oldershaw

Average: 0.00, 0 Ratings

Philip s Guide to Gems Stones and Crystals

By Cally Oldershaw

Average: 0.00, 0 Ratings

Oceans

By Cally Oldershaw

Average: 0.00, 0 Ratings

3D Eyewitness

By DK Publishing, Cally Oldershaw

Average: 0.00, 0 Ratings

Gemstones Rocks Minerals and Gemstones

By Cally Oldershaw, Christine Woodward, Roger Harding

Average: 0.00, 0 Ratings

Oceans

By Cally Oldershaw

Average: 0.00, 0 Ratings

Describes the physical characteristics, plants and animals, resources, pollution, and conservation of the world's oceans.

Firefly Guide to Gems Firefly Guide

By Cally Oldershaw

Average: 0.00, 0 Ratings

Firefly guide to gems

By Cally Oldershaw

Average: 0.00, 0 Ratings

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.