MAS'UD, Rahmat Ibnu; TRIYONO, Sugeng; WALUYO, Sri; -, Tamrin. 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://jtep.fp.unila.ac.id/index.php/JTP/article/view/25. Acesso em: 5 jul. 2026.