Heikki Oja

Heikki Oja (born 20 May 1945 in Helsinki, Finland) is a Finnish docent of astronomy, Doctor of Philosophy and the former director of the almanac office of the University of Helsinki. Provided by Wikipedia
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1
Published 1987
Springer New York
Other Authors: “...Oja, Heikki...”
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2
Published 2007
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”
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3
Published 1990
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”
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4
Published 2003
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”
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5
Published 1996
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”
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6
Published 1994
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”
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7
Published 2017
Springer Berlin Heidelberg
Other Authors: “...Oja, Heikki...”