Barbara Lee Bleau Ph.D. Books

Forgotten Calculus

By Barbara Lee Ph.D. Bleau, Barbara Lee Bleau

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Forgotten Calculus A Refresher Course

By Barbara Lee Bleau, Barbara Lee Bleau Ph.D.

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Forgotten algebra

By Barbara Lee Bleau

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"Set up as a workbook, Forgotten Algebra contains 32 units, starting with signed numbers, symbols and first-degree equations and progressing to include logarithms and right triangles. ... This four...

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.