De S . WAIDYANATHA, U.P.SAMARANAYAKB, C.De SOYZA, A.G.A.PBRBRA, M.C.2013-05-082013-05-081983Journal of the Rubber Research Institute of Sri Lanka61pp.17-24https://dl-rri.nsf.gov.lk/handle/1/1537Virgin bark tapping of RRIC 100, RRIC 101 and RRIC 103A