I am trying to find out if I have a complete set of the Sheraton Casino, Mississippi, Space Series.
I have the following:

Hubble Telescope
Challenger April 1983-January 1986
Apollo 1968-1973
Viking Lander I Mars Mission August 1976
Soyuz Rocket Mission to Mir Space Station March 1995
Voyager 1 Deep Space Probe - September 1977

Please let me know which ones I am missing (if any), and if anyone can help me obtain a complete set.
Thanks,
Jay