Josh Powell Books

Single Page Web Applications

By Michael Mikowski, Josh Powell

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The UCDP and AidData codebook on georeferencing aid version 1.1

By Daniel Nielson, Michael Findley, Daniel Strandow, Josh Powell

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This codebook details how aid events that are available from AidData and other donor sources can be assigned latitude and longitude coordinates, i.e. be geo-referenced, under the UCDP/AidData codin...

Dragon Apocalypse

By Josh Powell

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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.