An diofar eadar na mùthaidhean a rinneadh air "820an"

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b robot Adding: mk:820-ти
b robot Adding: nah:820 xihuitl
Loidhne 43:
[[mr:इ.स.चे ८२० चे दशक]]
[[ms:820-an]]
[[nah:820 xihuitl]]
[[no:820-årene]]
[[nrm:Annaées 820]]