Djaenudin, D. “Some Spesific Soil Characteristics of Andisols As Series Differentiae: A Case Study of Cikajang and Cikole Regions, West Java”. Jurnal Ilmu Tanah Dan Lingkungan, vol. 6, no. 1, Apr. 2004, pp. 14-21, https://doi.org/10.29244/jitl.6.1.14-21.