[1] ハウラー - Wikipedia (10/2/2016, 3:41:02 AM) <https://ja.wikipedia.org/wiki/%E3%83%8F%E3%82%A6%E3%83%A9%E3%83%BC>
[2] Howrah - Wikipedia (10/14/2016, 3:51:02 AM) <https://en.wikipedia.org/wiki/Howrah>
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