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Sumkar District is a district in the north of Madang Province in Papua New Guinea. It is one of the six administrative districts that make up the province. Sumkar is a district which is made up of Karkar Island and part of mainland NCR.
- Walter Topagal (21 January 2005). "Madang Provincial Economic Profile". Papua New Guinea Department of Mining. Archived from the original on 13 Oct 2007. Retrieved March 26, 2013.
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