Llista de llançaments de NRO (Catalan Wikipedia)

Barhorst, Leo. «Reason for FIA Radar 1/USA 215 retrograde orbit?», 01-10-2010. [Consulta: 2 octubre 2010].
Molczan, Ted. «NROL 41», 22-09-2010. [Consulta: 2 octubre 2010].
Molczan, Ted. «RE: NROL-49 search elements», 22-01-2011.

skyrocket.de

space.skyrocket.de

Krebs, Gunter. «NROL launches». Gunter's Space Page. [Consulta: 8 desembre 2016].

spaceflightnow.com

NROL-25 Mission Status
Spaceflight Now: Worldwide launch schedule. Spaceflightnow.com. Retrieved on Feb 3, 2012.
Delta 4 headed for backwards orbit
Spaceflight Now: Worldwide launch schedule. Spaceflightnow.com. Retrieved on September 15, 2011.
Atlas Launch Report | Mission Status Center. Spaceflight Now. Retrieved on September 15, 2011.
«Triple-barrel Delta 4-Heavy launches national security satellite». Spaceflight Now, 11-06-2016. [Consulta: 12 juny 2016].
Ray, Justin «Surveillance satellite launching Thursday atop Delta 4-Heavy rocket». Spaceflight Now, 07-06-2016.
^{[enllaç sense format]} http://www.spaceflightnow.com/atlas/av023/images/NROL38logo.jpg
«2016 manifest preview: United Launch Alliance’s busy year ahead». Spaceflight Now, 20-04-2015. [Consulta: 24 abril 2015].
Clark, Stephen. «Spaceflight Now — Launch schedule». Spaceflight Now, 08-12-2016. [Consulta: 8 desembre 2016].
Ray, Justin «Spy satellite infrastructure supported by successful Atlas 5 rocket launch». Spaceflight Now, 28-07-2016.
«NROL-61 satellite launched Thursday spotted in space by sky-watchers». Spaceflight Now, 30-07-2016.
«Feb. 9 Atlas 5 • NROL-79» (en anglès).

spacenews.com

«NRO discloses previously unannounced launch contract for SpaceX». [Consulta: 19 maig 2016].
Gruss, Mike «No complaint from SpaceX as Air Force skips competition for pair of NRO missions». SpaceNews, 08-08-2016. «In its announcement, the Defense Department said it plans to award a formal contract for the first mission, known as NROL-82, later this year for a 2020 launch. It also plans to award a contract for the second mission, known as NROL-91, in late 2017 with a tentative launch date of 2023.»

sworld.com.au

Steven Pietrobon's Space Archive – US Military Launch Record. None. Retrieved on September 15, 2011.

twitter.com

McDowell, Jonathan. «Twitter», 10-02-2016. [Consulta: 13 febrer 2016]. «TOPAZ 4 (USA 267) has been observed by hobbyist @cgbassa in a 1084 x 1086 km x 123 deg orbit following today's launch from Vandenberg»

ulalaunch.com

:::: United Launch Alliance, LLC :::: Arxivat 2011-09-01 a Wayback Machine.. Ulalaunch.com. Retrieved on September 15, 2011.
^{[enllaç sense format]} http://www.ulalaunch.com/site/pages/Launch.shtml#/30/ Arxivat 2011-09-01 a Wayback Machine.
«United Launch Alliance Successfully Launches Second Mission in Just Seven Days». United Launch Alliance. Arxivat de l'original el 2015-07-20. [Consulta: 11 abril 2014].

web.archive.org

«National Reconnaissance Office Satellite Destroyed August 19, 1998». Arxivat de l'original el de desembre 21, 2016. [Consulta: de març 1, 2017].
«National Reconnaissance Satellite Successfully Launched May 22, 1999». Arxivat de l'original el de maig 27, 2010. [Consulta: de març 1, 2017].
«NRO Successfully Launches Last Titan from Cape Canaveral April 29, 2005». Arxivat de l'original el de maig 27, 2010. [Consulta: de març 1, 2017].
Encyclopedia Astronautica – Delta 7000 Arxivat 7-3-2008 a Wayback Machine.
«NRO SUCCESSFULLY LAUNCHES PAYLOAD FROM TITAN IV September 10, 2003». Arxivat de l'original el de maig 27, 2010. [Consulta: de març 1, 2017].
^{[enllaç sense format]} http://msdb.gsfc.nasa.gov/MissionData.php?mission=NROL-33 Arxivat 2013-02-17 a Wayback Machine.
:::: United Launch Alliance, LLC :::: Arxivat 2011-09-01 a Wayback Machine.. Ulalaunch.com. Retrieved on September 15, 2011.
^{[enllaç sense format]} http://www.ulalaunch.com/site/pages/Launch.shtml#/30/ Arxivat 2011-09-01 a Wayback Machine.
^{[enllaç sense format]} http://msdb.gsfc.nasa.gov/MissionData.php?mission=NROL-38 Arxivat 2011-10-15 a Wayback Machine.
«NRO Press Release 2013-04». Arxivat de l'original el 2017-01-19. [Consulta: 1r març 2017].
^{[enllaç sense format]} http://msdb.gsfc.nasa.gov/MissionData.php?mission=NROL-65 Arxivat 2013-02-17 a Wayback Machine.
«United Launch Alliance Successfully Launches Second Mission in Just Seven Days». United Launch Alliance. Arxivat de l'original el 2015-07-20. [Consulta: 11 abril 2014].