High Energy Astronomy Observatory 1
[de] High Energy Astronomy Observatory 1
[es] HEAO-1
[fr] HEAO-1
[gl] High Energy Astronomy Observatory 1
[he] HEAO-1
[hu] High Energy Astrophysical Observatory
[id] High Energy Astronomy Observatory 1
[it] HEAO 1
[ja] HEAO-1
[pt] High Energy Astronomy Observatory 1