Tetsuya Toyoda Books

Goggles

By Yohan Leclerc, Tetsuya Toyoda

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UNDERCURRENT

By Tetsuya TOYODA

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Jinko gensho chokorei shakai to gaikokujin no hosetsu

By Tetsuya Toyoda, Kumagai Yoshitaka Researcher In Protected Area Management, Takeshi Akiba, Noriko Narisawa, Yo Negishi

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Theory and politics of the Law of Nations

By Tetsuya Toyoda

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"Emergence of the modern science of international law in the seventeenth and eighteenth centuries is usually attributed to Hugo Grotius (1583-1645) and other 'founders of international law.' Based...

Theory and Politics of the Law of Nations

By Tetsuya Toyoda

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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.