Hilda Simon Books

Feathers Plain and Fancy
Feathers Plain and Fancy

By Hilda Simon

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Insect Masquerade
Insect Masquerade

By Hilda Simon

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Sight and seeing
Sight and seeing

By Hilda Simon

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Discusses the importance of the sense of sight, the difference between sensitivity to light and the actual formation of images, and the various sight organs found in animals.

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Partners, guests, and parasites
Partners, guests, and parasites

By Hilda Simon

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Describes associations made between different animal species for temporary gain or convenience as well as more permanent alliances formed for mutual survival.

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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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