Chaudhry, Jamil Ahmed, Farooq Ahmed Khan, and M Masood Pervaiz. “APMP INTERCOMPARISON OF DC VOLTAGE STANDARD AT NPSL ISLAMABAD”. Biological Sciences - PJSIR 45, no. 2 (April 22, 2002): 140–144. Accessed November 24, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/1773.