VOA- Mars Landing (20 July, 1976)
/Voice of America shortwave coverage of the landing of
an unmanned spacecraft (Viking 1) on Mars.
Recorded off-air by Ian Holder, Brisbane, Australia.
Viking 1 (1976) information-
http://www.jpl.nasa.gov/missions/viking-1/
https://www.nasa.gov/image-feature/sunset-at-the-viking-lander-1-site
Other broadcasts-
https://archive.org/details/@i_holder