?STUDY ON PHYSICAL PROPERTIES OF URINE-OXALIC ACID MIXTURE. Biological Sciences - PJSIR, [S. l.], v. 42, n. 5, p. 220–222, 1999. Disponível em: https://biostaging.pjsir.org/index.php/biological-sciences/article/view/2162. Acesso em: 22 mar. 2026.