Discussion on macro, meso and microstructures in the mass migration Mexico-United States: late twentieth century and the early twenty-first. A different perspective to understanding the phenomenon of great importance for Mexico. Acta Universitaria [Internet]. 2012 Nov. 15 [cited 2026 Apr. 28];22(7):37-46. Available from: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/372