00397nam a2200109Ia 4500008004100000100001900041245008900060260009900149300001200248650000800260700001900268220216s9999 xx 000 0 und d aTiong Gan Lian 0aEvaluation of adopting the controlled upward tapping system after panel BO-2 tapping bProceedings of the Rubber Research Institute of Malaysia, Rubber Growers Conference 1986c1986 a131-143 aCUT aKheng Chew O E