Search for: [Subject and Keywords = water biology] OR [Subject and Keywords = biologia wody słodkiej] OR [Title = Polymorphous formulae of esterases and transferin of two perch \(Perca fluviatilis L.\) and roach \(Rutilus rutilus L.\) populations in the Piaseczno Reservoir \(an inundated sulphur mine\) and the Dobczyce Reservoir] OR [Creator = Starmach, Janusz]