Charles S. Spencer Books

The Cuicatlan Canada and Monte Alban: A Study of Primary State Formation

By Charles S. Spencer

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A pre Hispanic chiefdom in Barinas Venezuela

By Charles S. Spencer

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Between 1983 and 1992, the authors conducted an archaeological project that involved five years of survey and excavation in a 450 km² study region that included portions of the high llanos (savanna...

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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.