Robert D. Drennan Books

Regional Archaeology in the Valle De LA Plata Colombia

By Robert D. Drennan

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Prehistoric Social Political and Economic Development in the Area of the Tehuacan Valley

By Robert D. Drennan

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Statistics for Archaeologists

By Robert D. Drennan

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Prehispanic Chiefdoms in the Valle De LA Plata

By Robert D. Drennan, Luisa Fernanda Herrera

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"Seven pottery types defining three Formative, two Regional Classic, and one Recent Phase were clustered based on mineralogy to estimate population growth and centralized control. Results imply el...

Prehispanic Chiefdoms in the Valle De LA Plata

By Robert D. Drennan

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Prehispanic Chiefdoms in the Valle De La Plata University of Pittsburgh Memoirs in Latin American Archaeolo

By Robert D. Drennan

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Las sociedades prehispanicas del alto Magdalena

By Robert D. Drennan

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Excavations at Quachilco

By Robert D. Drennan

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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.