C-9 Skytrain

• The Aviation Zone: McDonnell Douglas C-9 Nightingale  - Presents image galleries, fact sheets, specifications, news updates, and links about the C-9A Nightingale.
• GlobalSecurity.org: C-9A/C Nightingale C-9B Skytrain II  - Resource site contains aircraft description, specifications, and featured aerial photos.
• Naval Historical Center: C-9 SKYTRAIN II  - Home page of the Naval Historical Center provides history, data, and specifications for the C-9 passenger and cargo aircraft.