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Logistics and Transport > 2019 > 41 > 73-84
Studia Periegetica > SP 2016 > 15(1) > 83-97
Organizacja i Zarządzanie : kwartalnik naukowy > 2011 > nr 1 > 75-89
Journal of Teacher Education for Sustainability > 2009 > 11 > 1 > 43-49
Journal of Teacher Education for Sustainability > 2009 > 11 > 1 > 43-49
Journal of Teacher Education for Sustainability > 2009 > 11 > 1 > 43-49