Barry Johnson Books

Lens Design Fundamentals
Lens Design Fundamentals

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Moon Tide Monterey
Moon Tide Monterey

By Barry Johnson

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The Which Word Picture Dictionary
The Which Word Picture Dictionary
Capital instruments
Capital instruments

By Barry Johnson

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Tolley s Manual of Accounting
Tolley s Manual of Accounting

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Tolley s Manual of Accounting
Tolley s Manual of Accounting

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Accounting provisions of the Companies Act 1985
Summary financial statements
Polarity management
Polarity management

By Barry Johnson

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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.

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