000 00310nam a2200109 4500
027 _aAgricultural economics study no. ; 32
041 _aeng
080 _a63.003.1(548.7)
_bS7
942 _cRR
110 _aSri Lanka. Department of Agriculture
245 _aCost of cultivation of agricultural crops: Yala - 1981
999 _c170724
_d170724