John Hayes Books

Drawings of Thomas Gainsborough
The Theory and Practice of Change Management
The Theory and Practice of Change Management
Introduction to Old Testament Study
Interpersonal Skills
Interpersonal Skills

By John Hayes, Hayes John

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Developing the Manager as a Helper
Interpersonal Skills at Work
Interpersonal Skills at Work

By John Hayes

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This book provides a clearly structured and comprehensive overview of the interpersonal skills that are essential for effective functioning at work.

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Understanding the unemployed
Understanding the unemployed

By Hayes John

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Understanding the Unemployed
Group Care for Children

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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.

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