Helgio Trindade Books

Les defis de l'education en Amerique latine

By Jean Michel Blanquer, Helgio Trindade

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Rio Grande da America do Sul

By Helgio Trindade

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"Historical treatment of political competition in Rio Grande do Sul focuses on patterns of electoral geography"--Handbook of Latin American Studies, v. 57.

A tentacao fascista no Brasil

By Helgio Trindade

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Rio Grande da America do Sul

By Helgio Trindade

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"Historical treatment of political competition in Rio Grande do Sul focuses on patterns of electoral geography"--Handbook of Latin American Studies, v. 57.

America Latina--eleicoes e governabilidade democratica

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Ciencias sociais no Brasil

By Helgio Trindade

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O Nazi-fascismo na America Latina

By Helgio Trindade

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O positivismo

By Helgio Trindade

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Las ciencias sociales en America Latina en perspectiva comparada

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Tentacao Fascista No Brasil

By Helgio Trindade

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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.