1. Scientific results of the Viking project;Flinn;J. geophys. Res.,1977
2. The Mars reference atmosphere;Kliore;Adv. Space Res.,1982
3. Shuttle-borne skyhook: a new tool for low-orbital-altitude research;Colombo;Smithsonian Astrophysical Observatory, Reports in Geoastronomy No. 1,1974
4. Tethered satellite study;Baker;NASA Technical Memorandum TM X-73314,1976
5. Acceleration levels on board the Space Station and a tethered elevator for micro and variable-gravity applications;Lorenzini,1987