Search for: [Subject and Keywords = water nut] OR [Subject and Keywords = kotewka orzech wodny] OR [Subject and Keywords = Trapaceae] OR [Subject and Keywords = Tarpa natans] OR [Title = On the protection of the water nut Trapa sp. div.] OR [Title = W sprawie ochrony kotewki Trapa sp. div.] OR [Creator = Staszkiewicz, Jerzy]