Ruth Karen Books

The land and people of Central America.

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An introduction to the seven countries of Central America including a discussion of the people and culture of the Mayan empire.

Kingdom of the sun

By Ruth Karen

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Discusses the culture of the Incas of Peru including their customs, daily life, art, and architecture.

Agribusiness and the small-scale farmer

By Williams Simon

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Agribusiness and the Small Scale Farmer

By Simon Williams, Ruth Karen

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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.

Ruth Karen Books

Towards the Year 2000

Writing Women s History

The land and people of Central America.

Song of the Quail

Feathered serpent

Kingdom of the sun

Toward the Year 2000

Agribusiness and the small-scale farmer

The Seven Worlds of Peru.

Agribusiness and the Small Scale Farmer

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?