[1]
K. Mahmood, I. H. naqvi, G. Ahmed, A. Mahboob, N. Baig, and M. Jumma, “SNUFFED TOBACCO MIGHTIER THAN SMOKED TOBACCO: FREQUENCY DETERMINATION OF UPPER AND LOWER RESPIRATORY TRACT DISEASES”, Pak J Chest Med, vol. 21, no. 2, pp. 54–60, Sep. 2015.