Gregory Alegi Books

Above the War Fronts

By Norman L. R. Franks, Gregory Alegi, Russell Guest

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Italian national markings

By Gregory Alegi

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Beskrivelse af den Italienske nationalitetsmærkning af fly, som begyndte i 1911 under den Tyrkisk-Italienske Krig og den senere ændring af afmærkningen i 1913, og endelig afmærkningen under 1. verd...

Macchi M.5.

By Gregory Alegi

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Beskrivelse af det italienske fly Macchi M.5 som startede prøveflyvningerne den 12 februar 1917.

Pomilio PD PE

By Gregory Alegi

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L'anno dell'ala

By Gregory Alegi

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Tonin

By Gregory Alegi

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Ali sul Trasimeno

By Gregory Alegi

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Caproni Ca. 3

By Gregory Alegi

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Ansaldo Baby

By Gregory Alegi

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Beskrivelse af det italienske amfibiefly Ansaldo Baby, bygget på licens fra England. Flyet blev testet i 1916 og Societá Italiana Transaerea fik en ordre på 100 fly, hvoraf 35 skulle leveres i juli...

Quaderno Sism 2017 Economic Warfare

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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.