Fernández Guzmán E. 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]. 15 de noviembre de 2012 [citado 23 de abril de 2024];22(7):37-46. Disponible en: https://www.actauniversitaria.ugto.mx/index.php/acta/article/view/372