Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Ricardo Francisco Malerba (24 August 1905 - 29 June 1974) (nickname: Luz Demar) was a bandoneon player, composer and bandleader (tangomusical genre) in Argentina during the golden age of tango.
Among outstanding compositions can be named: “Aristocracia”, “Cuando florezcan las rosas”, “Mariana” (waltzes), “Violín”, “La piba de los jazmines”, “Embrujamiento”, “Taruchito” (tangos).