PHOTOMETERS (OPTICAL INSTRUMENTS)
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BTOPTICAL INSTRUMENTS FOR MEASURING (OPTICAL INSTRUMENTS)
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UDC681.785.4
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Descriptor GERPHOTOMETER (OPTISCHE INSTRUMENTE)
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Descriptor ENGPHOTOMETERS (OPTICAL INSTRUMENTS)
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Descriptor FREPHOTOMÈTRES (INSTRUMENTS D'OPTIQUE)
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Variant GERFOTOMETER (OPTISCHE INSTRUMENTE)
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NTSPECTRALPHOTOMETERS (OPTICAL INSTRUMENTS)
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NTSCATTERED-LIGHT PHOTOMETERS (OPTICAL INSTRUMENTS)