Teguh Widodo, Indang Dewata, Iswandi Umar, Ramadhani. 2020. “ORRELATION BETWEEN LIFE EXPECTANCY AND PERCENTAGE POPULATION OVER 65 YEARS”. PalArch’s Journal of Archaeology of Egypt Egyptology 17 (7):5108-17. https://archives.palarch.nl/index.php/jae/article/view/2631.