Erdiansyah, N., Sumirat, U., & -, P. (2014). Variation of Potential Yield of Hybrid Population of Robusta coffee (Coffea canepor. Pelita Perkebunan (a Coffee and Cocoa Research Journal), 30(2), 92-99. https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v30i2.3