Pedrazzini, Fausto. “The Conditions of the Environment As Factors Affecting the Social and Political Stability of Populations”. Italian Journal of Agronomy 5, no. s3 (October 7, 2010): 27–31. Accessed August 4, 2025. https://agronomy.pagepress.org/index.php/agro/article/view/ija.2010.s3.27.