000 00310nam a2200109Ia 4500
008 220216s9999 xx 000 0 und d
100 _aDayaratne W C
245 0 _aAgricultural extension and the farmer
260 _bBulletin of the Rubber Research Institute of Sri Lanka
_c1992
300 _a4-Jan
942 _cJS
999 _c53956
_d53956