[1]
Prawoto, A.A. and Abdoellah, S. 1990. Variability of nutrient absorption in several cocoa planting materials. Pelita Perkebunan (a Coffee and Cocoa Research Journal). 6, 2 (Aug. 1990), 52-57. DOI:https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v6i2.373.