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ColumbusUnited States |
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JohannesburgSouth Africa |
822 553
(2013) |
822 553
(2013)
4 434 827
(2011) |
4 434 827
(2011) |
550 km2
|
550 km2
1 644 km2
|
1 644 km2
|
1 495.55
/km2 |
1 495.55/km2
2 697.58/km2
|
2 697.58
/km2 |