Robert Hobbs Books

Edward Hopper

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"Abstract Expressionist painter Lee Krasner (1908-1984) was the only critically recognized woman artist among the founders of the New York school of painting after World War II. Although her histor...

Andres Serrano, works 1983-1993

By Andres Serrano

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Cases and materials on Texas land titles

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20 Years 20 Artists

By Suzanne Farver, 20 Years 20 Artists 1999 Aspen Art Museum Aspen Colo., Robert Hobbs, Suzanne Feldman

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Milton Avery

By Robert Carleton Hobbs, Robert Hobbs

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Mark Lombardi

By Robert Hobbs, Mark Lombardi

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Richard Pousette Dart

By Joanne M. Kuebler, Robert Carleton Hobbs, Richard Pousette Dart

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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.