Negros Aires OP. 22A for Cello and Piano
https://drive.google.com/open?id=1N-91vsg0tB4k3fN_OQiVfIZUPU8aBkTO
Negros Aires OP. 22B for Double Bass and Piano
https://drive.google.com/open?id=1X-l2C8LhGQerbKrqQqmhLILW1nXBHTQ0