Francisco Jose Ledo Lemos Books

Femininum genus

By Francisco Jose Ledo Lemos, Ledo Lemos Francisco Jose

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The grammatical feminine gender was developed by Indo-European in relatively recent times, and was superimposed on an older system of two genders (animate / inanimate). The virtual totality of Indo...

La palabra mujer en indoeuropeo

By Ledo Lemos Francisco Jose, Francisco Jose Ledo Lemos

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En prácticamente todas las ramas indoeuropeas conocidas se encuentran testimonios de una protoforma cuyo significado hubo de ser “mujer” y que provisionalmente formularemos como *gw(e)n (H2 ). Est...

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.