Changlong Guan Books

Dunhuang ben kan yu wen shu yan jiu

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Ben shu fen wei Tang wu dai kan yu xin yang yan jiu, Dunhuang ben kan yu wen shu xiao lu liang bu fen, zhu yao nei rong bao kuo: Tang wu dai kan yu xin yang shu lüe; yi Dunhuang wen xian wei zhong...

Dunhuang ben shu shu wen xian ji jiao

By Changlong Guan

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Yuan zhi guo xue cong gao

By Changlong Guan

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Xian dai Han yu tong yong zi dian

By Changlong Guan

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Zhongguo xue shu shi shu lun

By Changlong Guan

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Fu Yu ji

By Changlong Guan, Yu Fu, Wenfang Xing

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Liang Song dao xue ming yun de li shi kao cha

By Changlong Guan

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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.