David Armentrout Books

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Gymnastics
Gymnastics

By David Armentrout

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Presents basic information on the essential skills, techniques, and equipment for gymnastics.

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Hockey--training and fitness
Hockey--training and fitness

By David Armentrout

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Focuses on the importance of basic training in the fundamentals of hockey and provides practice drills and training exercises to help young players achieve their goal of playing better hockey.

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Historic and famous cities
Historic and famous cities

By David Armentrout

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Describes a variety of historic and famous cities in the United States, from Mobile, Alabama, to Jackson, Wyoming.

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The Declaration of Independence
Drag bikes
Drag bikes

By David Armentrout

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Biofuels
Going Green
Historic and Famous Cities

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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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