ХРОЛЕНКО, М. В. Forming the basis of ecological culture of middle classes in the study of nature science. Pedagogy of Higher and Secondary Education, Kryvyi Rih, Ukraine, v. 38, p. 158–162, 2013. DOI: 10.31812/educdim.v38i0.3194. Disponível em: https://journal.kdpu.edu.ua/ped/article/view/3194. Acesso em: 22 nov. 2024.