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- Kings of the High Frontier
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- Kipper
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- Kir (Klingon)
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- Kir Alep
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- Kirazi
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- Kirk Fu Manual
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- Kirkland
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- Kirsten Clancy
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- Kis
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- Kistenn tai Drexa
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- Kitumba, Part 1
- Kitumba, Part 2
- Kiv
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- Klaa
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- Klaan
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- Klach D'Kel Bracht system
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- Klaestron I
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- Klaestron IV
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- Klaestron system
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- Klag, son of M'Raq (mirror)
- Klag (disambiguation)
- Klag (smuggler)
- Klah
- Klaha
- Klahb
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- Klamnin
- Klamuth
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- Klanth
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- Klar
- Klarc-Tarn-Droth
- Klarn
- Klarr
- Klarr (23rd century)
- Klarr (24th century)
- Klarshameth
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- Klarten
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- Klaus Wagner
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- Klavdia III
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- Klingon Battle Group 1
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- Klingon Bird of Prey Owners' Workshop Manual
- Klingon Black Staff
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- Klingon Civil War of 2411
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- Klingon Physicians Enclave
- Klingon Second Dynasty
- Klingon Ship Recognition Manual
- Klingon Starbase 1
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- Klingon Starbase 4
- Klingon Starbase 419
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- Klingon Starbase 8
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- Klingon Temporal Intelligence
- Klingon Third Dynasty
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- Klingon Women and Romulan Ale
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- Klingon bird-of-prey (Kelvin timeline)
- Klingon border starbase
- Klingon calisthenics program
- Klingon cargo ship
- Klingon colonies
- Klingon colony ship
- Klingon construction ship
- Klingon corvette