J. G. M. Thewissen Books

Encyclopedia of marine mammals

By W. F. Perrin, Bernd G. Wursig, J. G. M. Thewissen

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Ambulocetus natans, an Eocene cetacean

By J. G. M Thewissen

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The walking whales

By J. G. M. Thewissen

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"A ... first-person account of the discoveries that brought to light the early fossil record of whales. As evidenced in the record, whales evolved from herbivorous forest-dwelling ancestors that re...

The Bowhead Whale: Balaena Mysticetus: Biology and Human Interactions

By J. G. M. Thewissen, J. C. George

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Bowhead Whales

By J. G. M. Thewissen, J. C. George

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Emergence of Whales

By J. G. M. Thewissen

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Ambulocetus natans an Eocene cetacean Mammalia from Pakistan

By J. G. M. Thewissen, S. I. Madar, S. T. Hussain

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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.