Herbert R. Axelrod Books

Tropical fish in your home

By Herbert R. Axelrod

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Heifetz

By Herbert R. Axelrod

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Saltwater aquarium fishes

By Herbert R. Axelrod

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Tropical fish as a new pet.

By Herbert R. Axelrod

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Text and photographs direct the setting up of a tropical fish aquarium from equipment, water, and plants through selection, health, and feeding of the fish.

The atlas of discus of the world

By Herbert R. Axelrod

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The allure of discus

By Herbert R. Axelrod

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Goldfish guide

By Yoshiichi Matsui

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Goldfish and Koi in Your Home

By William Vorderwinkler, Herbert Axelrod, Herbert R. Axlerod

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Starting your tropical aquarium

By Herbert R. Axelrod

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Exotic marine fishes

By Herbert R. Axelrod

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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.