Norlander, Peter, and Todd A Sørensen. “21st Century Slowdown: The Historic Nature of Recent Declines in the Growth of the Immigrant Population in the United States”. Migration Letters 15, no. 3 (July 8, 2018): 409–422. Accessed November 23, 2024. https://migrationletters.com/index.php/ml/article/view/362.