Brian Duignan Books

The Judicial Branch
The Judicial Branch

By Brian Duignan

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Thinkers and theories in ethics
Thinkers and theories in ethics

By Brian Duignan

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Perspectives on moral behavior and ethical action are wide-ranging, and often involve divergent standards and approaches that produce ambiguous conclusions--yet we still arrive at universals. Echoe...

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The executive branch of the federal government
The legislative branch of the federal government
Modern philosophy
Modern philosophy

By Brian Duignan

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Concerned more with rationality, human nature, and human interaction with society and the world than the theological questions of the Middle Ages, contemporary philosophy has advanced study of the...

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Thinkers and theories in ethics
Thinkers and theories in ethics

By Brian Duignan

Average: 0.00, 0 Ratings

Perspectives on moral behavior and ethical action are wide-ranging, and often involve divergent standards and approaches that produce ambiguous conclusions--yet we still arrive at universals. Echoe...

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U. S. Constitution and Constitutional Law
Political Systems Structures and Functions
Political Parties Interest Groups and Elections
Science and Philosophy of Politics

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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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