W. K. Huchtmeier Books

A General Catalog of HI Observations of Galaxies: The Reference Catalog

By W.K. Huchtmeier, O. G. Richter

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General Catalog of HI Observations of Galaxies

By O. G Richter, W. K. Huchtmeier

Average: 0.00, 0 Ratings

This reference catalogue compiles observations of external galaxies, including more than 18 700 entries for more than 9 500 galaxies based on nearly 900 reference sources. It offers the HI data as...

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.