INSTRUMENTS FOR SOLAR OBSERVATIONS (ASTRONOMY)
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BTASTRONOMICAL INSTRUMENTS AND TECHNIQUES
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UDC520.24
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Descriptor GERSONNENBEOBACHTUNGSINSTRUMENTE (ASTRONOMIE)
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Descriptor ENGINSTRUMENTS FOR SOLAR OBSERVATIONS (ASTRONOMY)
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Descriptor FREINSTRUMENTS POUR L'OBSERVATION DU SOLEIL (ASTRONOMIE)
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Variant GERINSTRUMENTE/SONNENBEOBACHTUNGSINSTRUMENTE (ASTRONOMIE)
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Variant ENGSOLAR OBSERVATIONS/INSTRUMENTS FOR SOLAR OBSERVATIONS (ASTRONOMY)
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Variant ENGSOLAR INSTRUMENTS (ASTRONOMY)
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Variant FRESOLEIL/INSTRUMENTS D'OBSERVATION DU SOLEIL (ASTRONOMIE)
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Variant FREOBSERVATION DU SOLEIL/INSTRUMENTS D'OBSERVATION DU SOLEIL (ASTRONOMIE)