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1st CGPM, 1889: sanction of the international prototypes of the metre and the kilogram
Note: The definition of the metre was abrogated in 1960 (11th CGPM, Resolution 6, see below).
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7th CGPM, 1927: definition of the metre by the international Prototype
Note: This definition was abrogated in 1960 (11th CGPM, Resolution 6, see below).
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11th CGPM, 1960, Resolution 6: definition of the metre
Note: This definition was abrogated in 1983 (17th CGPM, Resolution 1, see below).
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15th CGPM, 1975, Resolution 2: recommended value for the speed of light
Note: The relative uncertainty quoted here is believed to correspond to three standard deviations in the data considered.
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17th CGPM, 1983, Resolution 1: definition of the metre
Note: The relative uncertainty given here corresponds to three standard deviations in the data considered.
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17th CGPM, 1983, Resolution 2: on the realization of the definition of the metre
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22nd CGPM, 2003, Resolution 8: revision of the mise en pratique of the definition of the metre
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CIPM, 2003, Recommendation 1: Revision of the Mise en Pratique list of recommended radiations
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