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Polsko-angielsko-niemiecki Glosariusz regionalny Województwa Opolskiego ("The Polish-English-German Glossary of the Regional Terminology of the Province of Opole") is a Polish book written by Tomasz Kamusella, which has been banned by the Polish government.
References
Polsko-angielsko-niemiecki Glosariusz regionalny Województwa Opolskiego Wikipedia(Text) CC BY-SA