JAKOVERIS, M.; STANKŪNIENĖ, E. Comparison in physical geography lessons. Psichologija, [S. l.], v. 2, p. 35–50, 1962. DOI: 10.15388/Psichol.1962.2.8849. Disponível em: https://www.journals.vu.lt/psichologija/article/view/8849.. Acesso em: 5 may. 2024.