000 003250000a22001330004500
050 _a010
060 _a100
082 _a631 SIN
100 _aSinghal, OP
245 _aAgricultural engineering:Surveying, Levelling, Irrigation and drainage, V.2
260 _aMeerut, Aman publishing house
300 _a11
942 _cBK
999 _c368204
_d368204