Ninh Than is former district of Hải Hưng province. It was formed in February 1979 from merger of Thanh Miện and Ninh Giang districts.[1]

References

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  1. ^ "Từ điển bách khoa toàn thư Việt Nam - Tu dien bach khoa toan thu Viet Nam - http://www.bachkhoatoanthu.gov.vn". Archived from the original on 2011-10-01. Retrieved 2010-01-02. {{cite web}}: External link in |title= (help)