Penelope Leach Books

Who Cares

By Penelope Leach

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The baby pack.

By Penelope Leach

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Your Baby and Child: From Birth to Age Five

By Penelope Leach

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Your baby child

By Penelope Leach

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Om barnets reaktioner og udvikling gennem de seks første leveår. Om daglig pleje, ernæring og hvordan forældre kan hjælpe barnet til at bruge sin krop og udvikle sine sanser.

Your baby child

By Penelope Leach

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Your baby & child from birth to age five

By Penelope Leach

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Babyhood Stage by Stage from Birth to Age Two

By Penelope Leach

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The child care encyclopedia

By Penelope Leach

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Babyhood

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Your Growing Child

By Penelope Leach

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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.