Arianto, Maniur, and Ahmad Hafizullah Ritonga. 2019. “ANALISA KADAR Pb PADA RAMBUT TUKANG BECAK SEKITARAN JALAN KAPTEN MUSLIM MEDAN”. JURNAL ANALIS LABORATORIUM MEDIK 4 (1). https://e-journal.sari-mutiara.ac.id/index.php/ALM/article/view/817.