Perry John Books

Zoos.
Zoos.

By Perry John

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Describes the operation of a zoo and the duties of various zoo employees including the preparation and cleaning of cages and the feeding and care of animals.

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Our polluted world
Our polluted world

By Perry John

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The art of procrastination
The art of procrastination

By Perry John

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Explains the principles of structured procrastination and provides tips and techniques to chronic procrastinators for developing an attitude of acceptance for their accomplishments while enjoying t...

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Texas
Texas

By Perry John

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The nature of Florida
The nature of Florida

By Perry John

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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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