Roy Ruffin Books

Principles of economics
Principles of economics

By Roy Ruffin

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Principles of microeconomics
Principles of microeconomics

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Principles of economics
Principles of economics

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Principles of microeconomics
Principles of microeconomics

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Principles of macroeconomics
Principles of macroeconomics

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Principles of economics
Principles of economics

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Principles of macroeconomics
Principles of macroeconomics

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Princpls Microecons
Princpls Microecons

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Principles of microeconomics
Principles of microeconomics

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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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