P.V. S. MACHIRAJU; Y. L. N. MURTHY. INDUSTRIAL SLUDGE AS A FERTILIZER SUBSTITUTE. International Journal of Pharma and Bio Sciences, [S. l.], v. 2, n. 1, p. 113–119, 2011. Disponível em: https://ijpbs.net/index.php/journal/article/view/663. Acesso em: 23 jul. 2026.