Pedacinhos do Ceu (performance scores) - OB/BSN or OB/BSN/PN

Pedacinhos do Ceu
for oboe and bassoon
by Waldyr Azevedo (1923-1980) - Argentine choro conductor and performer

This piece comes with a performance score for the oboe and bassoon duet. There are also chord symbols written out over the treble part- this is meant for an improvisatory keyboard part, even though none is written out.