The liner notes can be downloaded for free from the smithsonian, and they are a fantastic resource.
Much like another recording from the Smithsonian Folways, Capoeira Angola: from Salvador Brasil by Grupo de Capoeira Angola Pelourinho, whose liner notes can also be downloaded for free.
This is a video with some reflections from the four women who participated in the project Songs of our native daughters.
And this is a video of GCAP from 1991 - a classic!