Rukhsana Firdous , Safia Ahmed,Shabbir Ahmad Chaudhary , Ahsan Ahmad ,Naeem Akhtar. (2011). Evaluation of Resistance in Clinical Isolates of E. coli, S. aureus, and P. aeruginosa against β-lactam Antibiotics and Gentamicin. Journal of Rawalpindi Medical College, 15(1). Retrieved from http://journalrmc.com/index.php/JRMC/article/view/637