Keywords: Arbeitsmigranten ; Einwanderung ; Illegale Migration ; Kalifornien ; Mexiko ; Nebraska ; Guatemala ; Foreign workers, Mexican ; Foreign workers, Guatemalan ; Immigrants Social conditions ; Illegal aliens Social conditions ; Immigrants Social conditions ; Illegal aliens Social conditions ; Transnationalism ; Alien labor, Mexican California ; Alien labor, Guatemalan Nebraska ; Immigrants California ; Social conditions ; Illegal aliens California ; Social conditions ; Immigrants Nebraska ; Social conditions ; Illegal aliens Nebraska ; Social conditions ; Oaxaca (Mexico : State) Emigration and immigration ; Guatemala Emigration and immigration ; California Emigration and immigration ; Nebraska Emigration and immigration ; Oaxaca (Mexico : State) Emigration and immigration ; Bildband ; Bildband ; Bacon, David 1948- ; Fotografie ; USA ; Einwanderer