1
by Kling, Andrew A., 1961-
Published 2013
Subjects: ...Explorers....
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2
by Nardo, Don, 1947-
Published 2011
Subjects: ...Explorers -- Polar regions -- Biography....
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3
Published 2015
Subjects: ...Explorers....
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4
by Brownell, Richard.
Published 2013
...Outer space Exploration....
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5
by Parks, Peggy J., 1951-
Published 2005
...Mars (Planet) Exploration....
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6
by Evans, Kimberly Masters.
Published 2013
...Outer space Exploration....
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7
by Nagel, Rob.
Published 2005
...Outer space Exploration History....
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8
Published 2014
...West (U.S.) Discovery and exploration Sources....
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9
by Pendergast, Tom.
Published 2000
...West (U.S.) Discovery and exploration....
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10
Published 1997
...America Discovery and exploration....
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