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Studia Periegetica > SP 2020 > 31(3) > 67-80
Studia Periegetica > SP 2018 > 23(3) > 69-76
Journal of Teacher Education for Sustainability > 2009 > 11 > 1 > 31-42
Journal of Teacher Education for Sustainability > 2009 > 11 > 1 > 18-30