Leon Kreitzman Books

Rhythms of Life: The Biological Clocks that Control the Daily Lives of Every Living Thing

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"Russell Foster and Leon Kreitzman explain the significance of the biological clock, showing how it has played an essential role in evolution and why it continues to play a vitally important role i...

Rhythms of Life: The Biological Clocks that Control the Daily Lives of Every Living Thing

By Russell G. Foster, Leon Kreitzman

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Seasons of Life: The Biological Rhythms That Enable Living Things to Thrive and Survive

By Russell G. Foster

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Just as daily events are timed by living creatures through circadian rhythms, so seasonal events are timed through an internal calendar that signals birds to return to nesting grounds, salmon to sp...

Seasons of Life: The Biological Rhythms That Enable Living Things to Thrive and Survive

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The 24 Hour Society

By Leon Kreitzman

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The 24 Hour Society

By Leon Kreitzman

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Rhythms of life

By RUSSELL G. FOSTER

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Rhythms of Life

By Leon Kreitzman, Russell Foster

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Seasons of life

By Russell G. Foster

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'Seasons of Life' explains why the seasons occur, the impact of seasonal change and how organisms have evolved to anticipate these changes.

Seasons of Life

By Leon Kreitzman

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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.