Źródła Dokumentacyjne Do Badań Pograniczana Przykładzie Łemkowszczyzny (1900–1947)

The text reflects on the use of documentary sources in the study of the borderland, using Lemkiv-shchyna in the first half of the 20th century as a case study. It examines materials including records of state authorities and political organisations from 1900–1947, the critical analysis of which provides a deeper under-standing of the processes shaping the cultural and natio-nal identity of Lemkivshchyna. The sources concerning the Lemkos and their localities make it possible to investigate changes in religious differentiation, national structure, population distribution (including in the con-text of resettlement), as well as the political factors that influenced these transformations.