John Grassy Books

Audubon Guide to the National Wildlife Refuges: Northern Midwest: Illinois, Indiana, Iowa, Michigan, Minnesota, Nebraska, North Dakota, Ohio, South ... Guides to the National Wildlife Refuges)

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Audubon Guide to the National Wildlife Refuges: Rocky Mountains: Idaho, Colorado, Montana, Utah, Wyoming

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Les singes

By John Grassy

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Des informations élémentaires, succinctes, dans une structure un peu échevelée et une présentation dynamique aux photographies spectaculaires et abondantes. [SDM].

National Audubon Society first field guide.

By John Grassy

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Explores the world of mammals, identifying their characteristics and describing individual species.

National Audubon Society First Field Guide Mammals

By Scholastic

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National Audubon Society Field Guide to the Rocky Mountain States

By National Audubon Society

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The most comprehensive field guide available to the Rocky Mountain region--a portable, essential companion for visitors and residents alike--from the go-to reference source for over 18 million natu...

Audubon first field guide

By John Grassy

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Explores the world of mammals, identifying their characteristics and describing individual species.

Apes and Monkeys An Eyes on Nature Book

By John Grassy

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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.