CHAUDHRI, M. A., KHALID ISLAM, and INAYAT ULLAH. “?TECHNIQUES FOR INTER-CALIBRATION OF DEAD WEIGHT PRESSURE TESTERS”. Biological Sciences - PJSIR 38, no. 9-10 (October 23, 1995): 375–378. Accessed June 8, 2025. http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/2525.