Этнографическая карта бѣлоруcского племени, 1903

(Ethnographic Map of the Belarusan peoples), Warsaw. This map was the basis for the two contemporary maps that followed. The second added shading for degrees of density. The third, by
Kazimier Lachnovič in 2010, added 1919 boundaries by ethnographer/historian Мітрафан Віктаравіч Доўнар-Запольскі (Mitrofan Viktorovich Dovnar-Zapol’skiy) and contemporary Belarus boundaries.