Lisa A. Alzo Books

Pittsburgh s Immigrants PA Images of America
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Cleveland Slovaks
Cleveland Slovaks

By John T. Sabol

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Cleveland Czechs
Cleveland Czechs

By John T. Sabol

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Baba's kitchen
Baba's kitchen

By Lisa A. Alzo

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The Family Tree Polish, Czech And Slovak Genealogy Guide
The Family Tree Polish, Czech And Slovak Genealogy Guide

By Lisa A. Alzo

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Trace your Eastern European ancestors from American shores back to the old country. This in-depth guide will walk you step-by-step through the exciting--and challenging--journey of finding your Pol...

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Slovak Pittsburgh
Slovak Pittsburgh

By Lisa A. Alzo

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Slovak Pittsburgh
Slovak Pittsburgh

By Lisa A. Alzo

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Sports Memories of Western Pennsylvania
Cleveland Slovaks
Cleveland Slovaks

By John T. Sabol, Lisa A. Alzo

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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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