Search for: [Subject and Keywords = Hydrobiology \- textbook] OR [Subject and Keywords = Hydrobiology \- definition \- scope \- development \- application \- research methods \- teaching] OR [Subject and Keywords = Hydrobiologia \- podręcznik] OR [Subject and Keywords = hydrobiologia \- definicja \- zakres \- rozwój \- stosowanie \- metody badań \- nauczanie] OR [Title = Obŝaâ gidrobiologiâ] OR [Creator = Zernov, Sergej Alekseevič \(1871–1945\)]

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