MAS’UD, R. I.; TRIYONO, S.; WALUYO, S.; -, T. Dissolved Phosphorus Of Phosphate Stones With Ultrasonic Waves As An Efforts. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), [S. l.], v. 1, n. 1, 2012. Disponível em: https://jurnal.fp.unila.ac.id/index.php/JTP/article/view/25. Acesso em: 12 nov. 2025.