"Province: Negros Oriental". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 23 May 2013. Retrieved 13 March 2013.
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"Province: Negros Oriental". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 23 May 2013. Retrieved 13 March 2013.