Search for: [Subject and Keywords = Hydrobiology] OR [Subject and Keywords = Hydrobiology \- aquatic organisms \- temperature \- light, \- water pH \- salts \- gases] OR [Subject and Keywords = Hydrobiologia] OR [Subject and Keywords = Hydrobiologia \- organizmy wodne \- temperatura \- światło \- pH wody \- sole \- gazy] OR [Title = Obŝaâ gidrobiologiâ] OR [Creator = Zernov, Sergej Alekseevič \(1871–1945\)]