Jack E. Henningfield Books

Nicotine
Nicotine

By Jack E. Henningfield

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Nicotine
Nicotine

By Miriam Cohen, Jack E. Henningfield

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Presents the latest information on the physical and psychological effects of smoking, the reasons people smoke, and the treatment for quitting this drug addiction.

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Barbiturates
Barbiturates

By Jack E. Henningfield

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Discusses the effects, side effects, and dangers of barbiturate use and abuse.

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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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