search query: @author Covens, L. / total: 5
references: 4-5 / 5
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4.
DBS: the view from Stan Hubbard
Satellite Communications
1992 : FEB, p.14-17
 1992 Covens, L.
5.
Providers Mull LEOs, GEOs
Channels
1990 : DEC, p.23-24
 1990 Covens, L.
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