Suprapto, Agus, Murti Astiningrum, and Hadi Rianto. “Optimalisasi Dosis Pupuk NPK Dan Pupuk Organik Cair Untuk Produksi Bawang Merah Di Lahan Pasca Erupsi Merapi”. Prosiding University Research Colloquium (February 21, 2018): 286–294. Accessed May 2, 2024. https://repository.urecol.org/index.php/proceeding/article/view/149.