Feiss Books

Lab Manual for Physical Geolog
Lab Manual for Physical Geolog

By Feiss

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Explanation of the Rule of Benedict
The formula
The formula

By Joel Feiss

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Retribution for Acts of Terrorism
Retribution for Acts of Terrorism

By Joel Feiss

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Dr. Jack Simpson, a prominent cardiologist at the Aspen Valley Hospital, is facing a controversial malpractice lawsuit involving accountant, Sam Kahn. Sam Kahn works in the back office of a Manhatt...

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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.

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