@book{68871,
	author = {Krishnakumar A K},
	title = {Soils under Hevea in India: A physical, chemical and mineralogical study with a reference to soil moisture cation influence on yield of Hevea brasiliensis},
	publisher = {Ph.D. Thesis. Indian Institute of Technology, Kharagpur, 1989},
	year = {1989}
}