The Berta Barreto de los Heros papers contain correspondence, articles and clippings of Berta Barreto de los Heros (1914-1993) relating to her involvement in the release of Bay of Pigs prisoners.

The collection includes correspondence, documents, and clippings of the negotiation and release of Cubans taken prisoner on the island after the Bay of Pigs invasion, including tapes of conversations with former prisoners. The collection also includes an album given to Barreto de los Heros signed by the members of Brigade 2506 that she helped escape after the invasion.