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The Aliens Among Us1981 / Collection / Del Rey / Ballantine
The Aliens Among Us1969 / Collection / Ballantine BooksWantedAll Judgment FledNovelAll Judgment Fled1968 / Novel
Ambulance Ship1979 / Collection / Del Rey / BallantineWantedCode Blue EmergencyNovelCode Blue Emergency1987 / Novel / Sector General #7
Deadly Litter1981 / Collection / Del Rey / Ballantine
The Dream Millennium1974 / Novel / Ballantine Books
The Escape Orbit1983 / Novel / Ace BooksWantedFederation WorldNovelFederation World1988 / Novel / Federation WorldWantedFutures PastCollectionFutures Past1982 / CollectionWantedThe Galactic GourmetNovelThe Galactic Gourmet1996 / Novel / Sector General #9
Hospital Station1985 / Collection / Del Rey / Ballantine
Lifeboat1972 / Novel / Ballantine Books
Major Operation1971 / Collection / Ballantine BooksWantedSecond EndingNovelSecond Ending1962 / NovelWantedThe Secret VisitorsNovelThe Secret Visitors1957 / NovelWantedSector GeneralCollectionSector General1983 / Collection / Sector General #5
The Silent Stars Go By1991 / Novel / Del Rey / Ballantine
Star Healer1985 / Novel / Sector General / Del Rey / Ballantine
Star Surgeon1963 / Novel / Ballantine Books
Tomorrow Is Too Far1971 / Novel / Ballantine BooksWantedUnderkillNovelUnderkill1979 / Novel
The Watch Below1966 / Novel / Ballantine Books