FIRMANITA, S. D.; ROSDIANA, I.; INDRAYANI, U. D. The Correlation between Duration of Employment, Body Posture and Smoking Habit on Low Back Pain Incidence An Analytic Observational Study Among Taxi Driver in Semarang Municipality. Sains Medika: Jurnal Kedokteran dan Kesehatan, v. 6, n. 1, p. 17–20, 7 Jun.2015.