The first migrations from Guerrero to the United States were detected by Foerster and Gamio in the second decade of the XX century, reaching 0.2 national percent Durand and Massey, 2003.
Las primeras migraciones guerrerenses en Estados Unidos fueron detectadas por Foerster y Gamio durante la segunda década del siglo XX, alcanzando 0.2 por ciento nacional Durand y Massey, 2003.