Harningsih T, Wimpy W. Penentuan Kadar Timbal Dalam Darah Operator SPBU di Kota Karanganyar Berdasarkan Kebiasaan Merokok: Determination of Lead Levels in Blood Operator SPBU in The City of Karanganyar Based on Smoking Habit. J Surya Medika. 2020;6(1):57-62. doi:10.33084/jsm.v6i1.1618