Search for: [Subject and Keywords = archaeology] OR [Subject and Keywords = archaeological site] OR [Subject and Keywords = stronghold] OR [Subject and Keywords = Dobrzyń Land \(Poland\)] OR [Subject and Keywords = Sumin, Lipno county \(Poland\)] OR [Subject and Keywords = archeologia] OR [Subject and Keywords = stanowisko archeologiczne] OR [Subject and Keywords = grodzisko] OR [Subject and Keywords = Ziemia Dobrzyńska \(Polska\)] OR [Subject and Keywords = Sumin, pow. lipnowski \(Polska\)] OR [Title = Sumin, pow. Lipno. Plan grodziska] OR [Title = Sumin, pow. Lipno. Plan grodziska] OR [Creator = Żurowski, K.] OR [Creator = Żurowski, K.]