Stravinsky, Villa Lobos, and Bach
This famous LP from the mid-50s is available for digital download or on CD or cassette direct from Smithsonian Folkways. The site includes a scan of the cover and liner notes. From the notes:
"Phyllis Curtin sang the Bachianas Brasileiras #5 in New York in 1953. Later, backstage, Villa-Lobos paid her the supreme compliment from composer to artist: 'Really definitive... you must record this for me that way.'"
The same performance with Curtin and the New Orchestral Society of Boston is available in the album COOK10659 Boston Symphony Hall 1954.
You can listen to this CD online at Smithsonian Global Sound, which is available through many libraries (including my own).
Buy from Smithsonian Folkways