skos:altLabel | - C9
- VR
- C-9
- Douglas C-9A Nightingale
- VC-9C
- C-9 Nightingale
- C-9 Nightingale/Skytrain II
- C-9A
- C-9A Nightingale
- C-9A \"Nightingale\"
- C-9B
- C-9B Skytrain II
- C-9C
- C-9K
- Douglas C-9B Skytrain II
- McDonnell Douglas C-9 Skytrain II
- McDonnell Douglas C-9A Nightingale
- McDonnell Douglas C-9B ''Skytrain II''
- McDonnell Douglas C-9B Skytrain
- McDonnell Douglas C-9B Skytrain II
- McDonnell Douglas VC-9C
- McDonnell_Douglas_C-9
- VC-9
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