Worlds featured in the stories of those soft-cover issues:
Apokolips
Avalon (DC Comics)
Bismoll
Bizarro World
Braal (DC Comics)
Citadel (comics)
Colu
Competalia
Czarnia (comics)
Daxam
Dryad (DC Comics)
Durla
Gemworld
H’lven
Imsk
Korugar
Krypton (comics)
Mogo
Multiverse (DC Comics)
New Genesis
Oa
Orando
Puppet Planetoid
Qward
Rann
Rao (comics)
Rimbor
Shanghalla
Sorcerers’ World
Takron-Galtos
Tamaran
Thanagar
Tharn
Transilvane
Trom
Tyrraz
Warworld
Weber’s World
Winath
Xanthu
Xolnar
Zuun (DC Comics)
Details here.
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