Fawz Abdul Salam K.AL-Saffar وآخرون 2023. Investigation at the molecular level for a nifgenes to bacteria klebsiella pneumoniea the use of polymerase chain reaction (PCR). Tikrit Journal of Pure Science. 22, 3 (2023), 58–62. DOI:https://doi.org/10.25130/tjps.v22i3.712.