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
Black Unity, Part I
18:28
#2
Black Unity, Part II
18:51
Album has 5 releases
Album releases in order of release date. Media format, release date, country, etc.

12" Vinyl
1972
United States

CD
1997

CD
8 Apr 1997
United States

12" Vinyl
30 Jun 1997
United States

SHM-CD
20 Jan 2021
Japan