| A | Un-MundoEngineer, Producer – Jim MessinaWritten-By, Arranged By, Producer – Steve Stills* |
2:03 |
| B | Merry-Go-RoundArranged By – Jeremy Stuart Producer – Jim Messina, Richard Furay*Written-By – Richard Furay* |
2:05 |
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 45-6572 | The Buffalo Springfield* | Un-Mundo / Merry-Go-Round (7") | ATCO Records | 45-6572 | US | 1968 |
| 45-6572 | The Buffalo Springfield* | Un-Mundo / Merry-Go-Round (7", Single, MO) | ATCO Records | 45-6572 | US | 1968 |
| 45-6572 | The Buffalo Springfield* | Un-Mundo (7") | ATCO Records | 45-6572 | US | 1968 |
| ATL 70.282 | Buffalo Springfield | Uno Mundo (7", Single) | Atlantic | ATL 70.282 | Germany | 1968 |
| 584189 | Buffalo Springfield | Uno Mundo (7") | Atlantic | 584189 | UK | 1968 |