N. I. Wantoputri, A. R. Nugroho, and S. Munawaroh, “Analysis of Nitrogen Concentration (Nitrate, Nitrite, Ammonia) in Groundwater in Ngaglik SubDistrict, Sleman Regency, Yogyakarta Province”, Open Soil Sci Environ, vol. 2, no. 1, pp. 1–8, Jun. 2024.