Michael J. Dubin Books

United States Congressional Districts and Data 1843 1883.

By Stanley B. Parsons, Michael J. Dubin, William W. Beach

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United States Congressional Districts 1883 1913

By Stanley B. Parsons, Michael J. Dubin, Karen Toombs Parsons

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United States Congressional elections, 1788-1997

By Michael J. Dubin

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United States presidential elections, 1788-1860

By Michael J. Dubin

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United States Gubernatorial Elections 1776 1860

By Michael J. Dubin

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"This major reference work provides complete returns for the gubernatorial elections by state and county for the period 1776 to 1860. This information is nowhere else available in one volume, and m...

Party Affiliations in the State Legislatures

By Michael J. Dubin

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"This book lists the party affiliation of every state legislator from 1796 through the elections of 2006. Information on each state includes a summary of how its electoral process developed, includ...

United States Presidential Elections 1788 1860

By Michael J. Dubin

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United States Gubernatorial Elections 1776 1860

By Michael J. Dubin

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United States Gubernatorial Elections 1932 1952

By Michael J. Dubin

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United States Congressional Districts and Data 1843 1883

By Michael J. Dubin, Stanley Parsons, William W. Beach

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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.