Y.B, K. and S.Y, K. 2018. Study Of Combination Therapy With Ipratropium Bromide And Levosalbutamol In Stable Chronic Obstructive Pulmonary Disease Patients.: Ipratropium Bromide And Levosalbutamol In Stable Chronic Obstructive Pulmonary Disease Patients. National Journal of Integrated Research in Medicine. 6, 3 (Jan. 2018), 60–63. DOI:https://doi.org/10.70284/njirm.v6i3.914.