ERA
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UDC"-0/2"
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Descriptor GERZEITRECHNUNG
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Descriptor ENGERA
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Descriptor FREÈRE
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Variant GERCHRISTLICHE ZEITRECHNUNG
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Variant ENGCHRISTIAN ERA
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Variant FREÈRE CHRÉTIENNE
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NTTHIRD MILLENNIUM A.D.
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NTFIRST MILLENNIUM A.D.
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NTFIRST MILLENNIUM B.C.
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NTEPOCHS
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NTSECOND MILLENNIUM A.D.
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RTCHRONOLOGY, CALENDARS AND TIME DETERMINATION