APMP INTERCOMPARISON OF DC VOLTAGE STANDARD AT NPSL ISLAMABAD. Biological Sciences - PJSIR, [S. l.], v. 45, n. 2, p. 140–144, 2002. Disponível em: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1773. Acesso em: 10 mar. 2026.