Thanks to GerryM for sending the following suggestions in a Mudcat PM
PASTURES OF PLENTY -   Woody Guthrie     https://www.youtube.com/results?search_query=Pastures+of+Plenty+-+Woody+Guthrie
BRACERO   -  Phil Ochs     https://www.youtube.com/watch?v=NrmNDZNmxIk
EMIGRANT EYES (Immigrant Eyes)  -   Guy Clark     https://www.youtube.com/watch?v=JBMqZ7xa1ZU
Various other recordings of the song     https://www.youtube.com/results?search_query=Emmigrant+Eyes+