Nora, S., 		Mawardi, S., 		Kuswardani, R., 		Mawardi, S., 		Wijoyo, H., 		Gandaseca, S., & 		Novita, A.
2023 Sep 30.  Analysis of Land Suitability for Arabica Coffee in Toba Regency, North Sumatra, Indonesia. International Journal of Biosciences and Biotechnology. [Online] 11:1