Tommy S. W. Wong Books

How Sai Baba Attracts Without Direct Contact: Diary of a 21st Century Sai Devotee

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Since Sai Baba left his physical body on 24 April 2011, so how can we keep in contact with him? Well, how about spiritual connection? See Baba beyond his physical body and establish spiritual conne...

Minimum Wage for Low Wage Workers

By Dr. Tommy S. W. Wong

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Kinematic wave rainfall runoff formulas

By Tommy S. W. Wong, Anthony S. Y Leong

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Overland flow and surface runoff

By Tommy S. W. Wong

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Rainfall forecasting

By Tommy S. W. Wong

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Flood risk and flood management

By Tommy S. W. Wong

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Wisdom on What Is Good and What Is Bad

By Tommy Wong

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Wisdom on How to Live Life

By Tommy Wong

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Wisdom on How to Live Life Bk. 2

By Tommy S. W. Wong

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Wisdom on How to Live Life

By Tommy Wong

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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.