ASTRONOMICAL INSTRUMENTS (OPTICAL INSTRUMENTS)
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BTOPTICAL MEASURING AND OBSERVATION INSTRUMENTS (OPTICAL INSTRUMENTS)
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UDC681.782
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Descriptor GERASTRONOMISCHE GERÄTE (OPTISCHE INSTRUMENTE)
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Descriptor ENGASTRONOMICAL INSTRUMENTS (OPTICAL INSTRUMENTS)
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Descriptor FREINSTRUMENTS ASTRONOMIQUES (INSTRUMENTS D'OPTIQUE)
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Variant GERGERÄTE/ASTRONOMISCHE GERÄTE (OPTISCHE INSTRUMENTE)
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Variant ENGINSTRUMENTS/ASTRONOMICAL INSTRUMENTS (OPTICAL INSTRUMENTS)
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RTASTRONOMICAL INSTRUMENTS AND TECHNIQUES