Ken Nicholls accordion Cuando Calienta El Sol

I recorded Cuando Calienta El Sol in January of 2015 and uploaded it to RUclips May 31, 2019. My music (from Frank Morocco) indicates that it was written by C.R. Rigual and C.A. Martinoli; according to Wikipedia, however, Rafael Perez perhaps deserves some (most?) of the credit for the origin of this piece.