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Astronomical instruments --- History. --- 529.78 <09> --- 529.78 <09> Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- Astronomy --- Instruments, Astronomical --- Optical instruments --- Physical instruments --- Scientific apparatus and instruments --- Space optics --- History --- Instruments

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Measuring methods in physics --- anno 1800-1899 --- Equipment and Supplies --- 681 <09> --- 529.78 <09> --- 681.2 --- 54.08 --- 389 <09> --- 527 --- Science --- history. --- Precision mechanisms and instruments--Geschiedenis van ... --- Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- Instrument-making in general. Instrumentation. Measuring instruments and their manufacture. Balances. Weighing devices --- Measurement principles, methods, techniques. Instrumentation --- Metrologie--Geschiedenis van ... --- Nautical and aeronautical astronomy. Navigation --- 527 Nautical and aeronautical astronomy. Navigation --- 389 <09> Metrologie--Geschiedenis van ... --- 54.08 Measurement principles, methods, techniques. Instrumentation --- 681.2 Instrument-making in general. Instrumentation. Measuring instruments and their manufacture. Balances. Weighing devices --- 529.78 <09> Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- 681 <09> Precision mechanisms and instruments--Geschiedenis van ... --- history --- Metrologie--Geschiedenis van .. --- Metrologie--Geschiedenis van

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Scientific apparatus and instruments --- Collectors and collecting --- -681 <09> --- 681.7 --- 389 <09> --- 529.78 <09> --- 527 --- Apparatus, Scientific --- Instruments, Scientific --- Science --- Scientific instruments --- Research --- Precision mechanisms and instruments--Geschiedenis van ... --- Optical apparatus and instruments --- Metrologie--Geschiedenis van ... --- Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- Nautical and aeronautical astronomy. Navigation --- Instruments --- Equipment and supplies --- Collectors and collecting. --- 527 Nautical and aeronautical astronomy. Navigation --- 529.78 <09> Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van ... --- 389 <09> Metrologie--Geschiedenis van ... --- 681.7 Optical apparatus and instruments --- 681 <09> Precision mechanisms and instruments--Geschiedenis van ... --- 681 <09> --- Metrologie--Geschiedenis van .. --- Time-measuring instruments. Clock setting, regulating. Time standards. Quartz crystal etc. Sundials. Gnomons--Geschiedenis van .. --- Precision mechanisms and instruments--Geschiedenis van .. --- Metrologie--Geschiedenis van . --- Metrologie--Geschiedenis van --- Scientific apparatus and instruments - Collectors and collecting