Calgary Public Library
Observations
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Observations
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6
Quasars + Observations
Climatology + Observations + History
Geodetic astronomy + Observations
Astronomy + Observations
Galaxies + Observations
Sun + Observations
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7
Galaxies + Observations
Geodetic astronomy + Observations
Quasars + Observations
Sun + Observations
Climatology + Observations + History -- 19th century
Meteorology -- Alberta -- Calgary -- Observations -- Collected works
Astronomy + Observations -- Popular works
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