found: United States. Army Map Service. Vietnam city maps 1:15,000. Hải Phòng, 1968.
found: BGN, 9-25-86(Hải Phòng [Vietnamese], Haiphong [conventional], ppl, 20°52ʹN, 106°41ʹE)
found: Wikipedia, February 14, 2018(Haiphong (Vietnamese: Hải Phòng) is a major industrial city and the second largest city in the northern part of Vietnam; Hải Phòng City; Thành phố Hải Phòng; municipality; subdivided into 15 district-level sub-divisions; they are further subdivided into 10 commune-level towns (or townlets), 148 communes, and 72 wards)
found: Getty thesaurus of geographic names online, February 14, 2018(Hải Phòng (municipality); variants: Thành Phố Hải Phòng; Hai Phong; Haiphong Municipality; Hai Phong province; place types: municipality; first level subdivision; also separate listing for: Hải Phòng (inhabited place))