Thaddeus C. Trzyna Books

Environmental protection directory

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Consumer protection directory

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Directory of consumer protection and environmental agencies.

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Current source of information on 2664 government and private organizations in the United States. Arranged in 2 sections, i.e., Consumer protection and Environmental protection. Entries include orga...

World Directory of Environmental Organizations

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Environmental impact requirements in the States: NEPA's offspring

By Thaddeus C. Trzyna

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The California environmental quality act

By Thaddeus C. Trzyna

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World Food Crisis

By Thaddeus C. Trzyna

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Population

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United States and the Global Environment

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Issues Alternatives

By Thaddeus C. Trzyna, Daniel A. Mazmanian

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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.