PRAMITA, H.; SAUGI ABDUH, S. A.; CHODIDJAH, C. The Difference in Effectiveness of 70% and 0.5% Chlorine to ReduceThe Germ Number on Stethoscope’s Membrane Experimental research at stethoscope in Baitul Izah Ward of Sultan Agung Islamic Hospital Semarang. Sains Medika: Jurnal Kedokteran dan Kesehatan, v. 3, n. 1, p. 63–68, 11 Jun.2011.