Paul Samuelson Books

1 (p1): 第一编基本概念 1 (p1-1): 第1章经济学基础知识 14 (p1-2): 第1章附录如何看图 20 (p1-3): 第2章现代经济中的市场与政府 36 (p1-4): 第3章供给与需求的基本原理 51 (p2): 第二编微观经济学:供给、需求和产品市场 51 (p2-1): 第4章供给和需求的应用 66 (p2-2): 第5章需求和消...

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.