M. Balagopalan, T.P. Thomas, M.V. Mary, S. Sankar, and T.G. Alexander. 1992. “SOIL PROPERTIES IN TEAK, BOMBAX AND EUCALYPT PLANTATIONS OF TRICHUR FOREST DIVISION, KERALA”. Journal of Tropical Forest Science (JTFS) 5 (1):35-43. https://jtfs.frim.gov.my/jtfs/article/view/1933.