METHODOLOGY TO FISH PRODUCTION EFFICIENCY EVALUATION.Published in:Electronic Journal of Polish Agricultural Universities, 2018, v. 21, n. 2, p. 1, doi. 10.30825/5.EJPAU.17.2018.21.2By:Wozniak, Malgorzata;Skibniewska, Krystyna A.;Guziur, Janusz;Zakrzewski, Janusz;Szarek, JozefPublication type:Article