Michael Soffel Books

Space Time Reference Systems

By Michael Soffel, Ralf Langhans

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Theory

By Gerhard Schafer, Sergei M. Kopeikin, Michael Soffel, Sergei Kopeikin, Thibault Damour

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Theory

By Gerhard Schafer, Toshifumi Futamase, Michael Soffel, Sergei Kopeikin, Thibault Damour

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Theory

By Gerhard Schafer, Sergei M. Kopeikin, Michael Soffel, Sergei Kopeikin, Thibault Damour

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The high accuracy of modern astronomical spatial-temporal reference systems has made them considerably complex. This book offers a comprehensive overview of such systems. It begins with a discussio...

Space Time Reference Systems

By Michael Soffel

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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.