@book{72599,
	author = {Waidyanatha U P de S and Stauss R},
	title = {Zero-grzed pasture under immature Hevea rubber : Improved productivity of Panicum maximum and P. maximum + Pureria phaseoloides and their competition with Hevea},
	publisher = {Journal of the Rubber Research Institute of Sri Lanka},
	year = {1982}
}