Migrating People and Material Culture and Art

I really find the sculpture and found-objects work of the artist Valerie James and Antonio Gallegos important socially conscious art, including the Las Madres Project and their new work now exhibiting in Sweden.  I am interested in immigrant/migrant material culture (such as retablos), and these artists work directly with material culture. In their art, James and Gallegos use the clothes, bordados (square white cloth embroidered with messages of caring that are given to people who are about to cross the border), children’s backpacks and notebooks, and other belongings that people had to leave behind.  Here are some internet links that describe their work (my apologies if some of the links may not eventually work, just let me know):

http://www.lasmadresproject.org/

http://www.tucsonweekly.com/tucson/washed-into-the-land/Content?oid=2096094

http://www.artandfaithinthedesert.com/2010/01/destination-x/

http://www.artandfaithinthedesert.com/2010/01/draft-excerpt-from-book-in-progress-bound-for-the-border-the-hidden-art-of-bordado/