Laurie Callihan Books

The best test preparation for the CLEP, College-Level Examination Program

By Laurie Callihan

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AP Biology w CD ROM REA 7th Edition The Best Test Prep for the AP Exam Test Preps

By Joyce A. Blinn, James M. Buckley, Laurie Ann Callihan, Shira Rohde, Jay M. Templin

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Praxis II biology

By Laurie Callihan

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AP Biology

By Callihan Laurie Ann Buckley Jr. James M. Blinn Joyce A. Templin Jay M. Rohde Shira Advanced Placement

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The best test preparation for the CLEP College Level Examination Program

By Laurie Callihan

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Overview: REA's CLEP Biology Test Prep with TestWare CD Helps You Earn College Credits! If you're looking for an easy and inexpensive way to earn college credit, why not take the CLEP Biology exa...

CLEP natural sciences

By Laurie Callihan

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Book Description: Earn College Credit with REA's Test Prep for CLEP* Natural Sciences. Everything you need to pass the exam and get the college credit you deserve. CLEP* is the most popular cred...

GEDTest REA s Total Solution For the 2014 GED Test GED Test Preparation

By Lisa Mullins, Stacey A. Kiggins, Laurie Callihan, Stephen Reiss

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GED R Total Solution For the 2021 GED R Test 2nd Edition

By Lisa Mullins, Stacey A. Kiggins, Laurie Callihan Ph.D., Rubianna Porter Ed.D., Stephen Reiss

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The Guidance Manual for the Christian Home School

By Laurie Callihan, David Callihan

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The best test preparation for the CLEP

By Laurie Callihan

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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.