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      astronomical observatories at Sofia, Bulgaria

    • Astronomical Observatory of Sofia University
      3km
      web
      Astronomical Observatory in Borisova Gradina, Астрономическата обсерватория в Борисовата градина 2
      Astronomical Observatory in Borisova Gradina,Sofia, Астрономическата обсерватория в Борисовата градина 2
      Sofia April 2009 TodorBozhinov (33)

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