Constitution Books

The creation of matter
The creation of matter

By Harald Fritzsch

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Making representation
Making representation

By William H. Brown

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This project involves a review of the career of Dr Helen MacMurchy (1864--1953) while she served as "Inspector of the Feeble-Minded" for the Province of Ontario between 1906 and 1919. More specific...

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Quantum theory of matter
Quantum theory of matter

By A. Modinos

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Solid, liquid, or gas?
Solid, liquid, or gas?

By Sally Hewitt

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Presents information about the properties of solids, liquids, and gases, using observation and activities.

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The Bill of Rights
The Bill of Rights

By R. Conrad Stein

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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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