In what year was the album “Blackground” released by Duo Ouro Negro?

In what year was the album “Blackground” released by Duo Ouro Negro?: The album “Blackground” was released in 1972 by Duo Ouro Negro.
What is the most successful song from the album “Blackground” by Duo Ouro Negro?: “Amanhã” is the biggest hit from the album “Blackground” by Duo Ouro Negro.

Other artists of Samba