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Text reemplaça - 'Vínculs externs' a 'Enllaços externs'
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<references/>
== Vínculs externs ==
== Enllaços externs ==
* [http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1977-049A Signe 3 al NASA NSSDC]
* [http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1977-049A Signe 3 al NASA NSSDC]
* [http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/signe3.html Signe 3 al NASA HEASARC]
* [http://heasarc.gsfc.nasa.gov/docs/heasarc/missions/signe3.html Signe 3 al NASA HEASARC]