Tamra B. Orr Books

A Career as an Aircraft Mechanic and Service Technician
Space Discoveries
Space Discoveries

By Tamra B. Orr

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People at the Center of The Civil Rights Movement People at the Center of
People at the Center of The Civil Rights Movement People at the Center of

By Tamra Orr, Tamra B. Orr

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Profiles people who led the civil rights movement in the United States, including Rosa Parks, Asa Philip Randolph, Ida B. Wells-Barnett, and Booker T. Washington.

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People at the Center of Prohibition People at the Center of
People at the Center of - The Salem Witch Trials (People at the Center of)
People at the Center of - The Salem Witch Trials (People at the Center of)

By Tamra Orr, Tamra B. Orr

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Profiles people who have been the driving force behind the most critical events of the Salem witch trials, including Heinrich Kramer, James Sprenger, Elizabeth Parris, Anne Putnam and Sarah Good.

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Science on the Edge Test Tube Babies Science on the Edge
Geothermal energy
Geothermal energy

By Frank Muschal, Tamra Orr

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Hydroelectric energy
Hydroelectric energy

By Tamra Orr

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Super Cool Science Experiments
Junior scientists.
Junior scientists.

By Tamra Orr

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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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