Patricia Calca Books

Image Of Us Presidential Administrations The Cases Of George W Bush And Barack Obama

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This book analyzes the image of the U.S. presidential administrations from 2001 to 2011 and their political image in foreign countries. The authors focus on the European perception of U.S. presiden...

Image of U. S. Presidential Administrations

By Antonio Bessa, Pablo Biderbost, C. Belim, Patricia Calca

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Executive Legislative Relations in Parliamentary Systems

By Patricia Calca

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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.