An diofar eadar na mùthaidhean a rinneadh air "1640an"

Chaidh 23 baidht a thoirt air falbh ,  9 bhliadhnaichean air ais
b
r2.6.4) (robot Removing: ksh:1640-er Joohre
b (r2.6.3) (robot Adding: vi:Thập niên 1640)
b (r2.6.4) (robot Removing: ksh:1640-er Joohre)
[[ka:1640-იანები]]
[[ko:1640년대]]
[[ksh:1640-er Joohre]]
[[kv:1640-ӧд вояс]]
[[la:Decennium 165]]
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deasachadh