Webster David Books

More brain-boosters

By Webster David

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A collection of puzzles, riddles, and experiments involving biology, physics, chemistry, and mathematics.

More brain-boosters

By Webster David

Average: 0.00, 0 Ratings

A collection of puzzles, riddles, and experiments involving biology, physics, chemistry, and mathematics.

Crossroad Puzzlers.

By David Webster

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How to do a science project.

By Webster David

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Suggestions for three types of science projects--report, demonstration, and research--with emphasis on procedures used to do a successful research project.

Track watching.

By Webster David

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Discusses the many things the amateur track watcher can learn from careful examination of animal, human, and machine tracks.

Let's find out about mosquitoes.

By Webster David

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Introduces the physical characteristics and habits of the mosquito.

Dissection projects

By Webster David

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An introduction to dissecting animals, discussing instruments, techniques, and acquisition of specimens and providing instructions for the dissection of clams, squids, fish, and others, as well as...

Spider watching

By Webster David

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Offers a close look at spiders and spider webs, explaining how spiders live and reproduce and how they serve a useful purpose by eating insect pests.

Spring

By Webster David

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A collection of activities and projects exploring nature in the spring.

Exploring nature around the year

By Webster David

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A collection of activities and projects exploring nature in the summer.

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.