"Province: Eastern Samar". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 5 June 2013. Retrieved 24 April 2013.
"Province: Eastern Samar". PSGC Interactive. Makati City, Philippines: National Statistical Coordination Board. Archived from the original on 5 June 2013. Retrieved 24 April 2013.