Jan S. Aritonang Books

On the edge of many worlds

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Mission schools in Batakland (Indonesia), 1861-1940

By Jan S. Aritonang

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A history of Christianity in Indonesia

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History of Christianity in Indonesia

By Karel Steenbrink, Jan S. Aritonang

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Yubileum 50 tahun GKPI Gereja Kristen Protestan Indonesia

By Jan S. Aritonang

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Historical development of GKPI, an Indonesian Protestant Church based in North Sumatera Province; volume commemorating the 50th anniversary of the Church.

Berbagai aliran di dalam dan di sekitar gereja

By Jan S. Aritonang

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History of Christian religious sects in Indonesia.

Belajar memahami sejarah di tengah realitas

By Jan S. Aritonang

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Sejarah perjumpaan Kristen dan Islam di Indonesia

By Jan S. Aritonang

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History of Christians and Muslims in Indonesia.

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.