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Philadelphia [u.a.]: Saunders College Publishing, 1988
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IOP Publishing, 1969
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IOP Publishing, 1970
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American Astronomical Society, 1961
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IOP Publishing, 1960
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American Astronomical Society, 1959
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IOP Publishing, 1959
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IOP Publishing, 1959
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American Astronomical Society, 1957
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American Astronomical Society, 1958
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Springer Science and Business Media LLC, 1979
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IOP Publishing, 1957
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American Astronomical Society, 1989
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IOP Publishing, 2023
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Springer Science and Business Media LLC, 2022
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IOP Publishing, 2023