ORCZYK, Józef. Factors Affecting Differences of Agricultural Productivity (in Particular Voivodeships) in People’s Poland (1945–1970). Studia Historiae Oeconomicae, [S. l.], v. 9, n. 1, p. 343–362, 1974. DOI: 10.14746/sho.1974.09.1.021. Disponível em: https://pressto.amu.edu.pl/index.php/sho/article/view/57950. Acesso em: 5 nov. 2026.