2019. Leaf Mineral Composition of Coffee Infected by a Hemileia vastatrix Fungus in Bondowoso, East Java. Pelita Perkebunan (a Coffee and Cocoa Research Journal). 35, 1 (Apr. 2019), 12–21. DOI:https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v35i1.345.