Holly Cefrey Books

Grasslands Cefrey Holly. Biomes.
Archaeologists
Archaeologists

By Holly Cefrey

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Examines the careers available in the field of archaeology, discussing the necessary education, training, and on-the-job duties.

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Igneous Rocks Cefrey Holly. Earth Rocks
Sedimentary Rocks Cefrey Holly. Earth Rocks
Metamorphic Rocks Cefrey Holly. Earth Rocks
Minerals Reading Power Earth Rocks Series
Fossils
Fossils

By Holly Cefrey

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The Plague
The Plague

By

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AIDS
AIDS

By Holly Cefrey

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Discusses the causes, diagnosis and treatment of the deadly disease known as AIDS, as well as recent developments in research to discover a cure.

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Race car drivers
Race car drivers

By Holly Cefrey

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If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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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