Album has these songs
All songs from every album releases
Many songs are available for 30 seconds preview listening (by Spotify Audio Preview Clips)
#1
Un Paso Adelante… (One Step Beyond…) (versión original)
02:33
#2
Mistakes (Errores)
02:52
Album has 3 releases
Album releases in order of release date. Media format, release date, country, etc.

7" Vinyl
1979
Spain

7" Vinyl
Nov 1979
United Kingdom

12" Vinyl
1981
United Kingdom