We use MARS (MARC Record Service) for outsourcing authority control which is managed by Backstage Library Works.
As part of the quarterly authority loading process, Backstage replaces specific/relevant subjects headings with terms from the following controlled vocabularies:
Undocumented Migrants (undoc)
Enslaved People (enslv)
Indigenous people (indig)
650 7Indigenous peoples|zAmazon River Region|vExhibitions.|2indig