Observatory (6)
Bulgaria |
Astronomical Observatory BG-Kardzhali |
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Astronomical Observatory BG-Plana |
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Astronomical Observatory & Planetarium BG-Gabrovo, +359 (66) 808-234 |
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Observatoria BG-Sofia |
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Observatoria Rozhen BG-Progled |
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Observatory BG-Varna, Morska gradina |