2
3
4
6
by Luhmann, J.G.
Published in Advances in Space Research (1997)
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7
by Luhmann, J.G.
Published in Advances in Space Research (1995)
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8
by Luhmann, J.G
Published in Advances in Space Research (1995)
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9
by Luhmann, J.G.
Published in Advances in Space Research (1995)
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10
11
by Luhmann, J.G.
Published in Space Science Reviews (1986)
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12
by Luhmann, J.G.
Published in Space Science Reviews (1983)
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13
by Luhmann, J. G.
Published in Nature (1979)
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14
15
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17
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