[1]
Mulkan Syahputra, supriadi, and P. Marpaung, “The Mapping of Irrigated Paddy Fields which were Polluted by Detergent Waste in Kolam Village, Percut Sei Tuan Sub-district, Deli Serdang District”, Petrop, vol. 8, no. 2, pp. 144-149, Jan. 2022.