Daniel Z. Kadar Books

Xue guanhua

By Daniel Z. Kadar

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Terms of im politeness

By Daniel Z. Kadar

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Historical Chinese letter writing

By Daniel Z. Kadar

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Collected letters from the Qing Dynasty era (1644-1911), with English translation.

Politeness in East Asia

By Daniel Z. Kadar

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"We use politeness every day when interacting with other people. Yet politeness is an impressively complex linguistic process, and studying it can tell us a lot about the social and cultural values...

Model letters in late imperial China

By Daniel Z. Kadar

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Understanding historical im politeness

By Daniel Z. Kadar, Marcel Bax

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Understanding historical (im)politeness

By Daniel Z. Kadar, Marcel Bax

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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.