000 00288nam a2200121Ia 4500
008 220201s1979 xx 000 0 eng d
082 _a891.433
_bGUReference
100 _aGurudutt
245 0 _aDoobati Nauka .
260 _bReference ajpal and Sons
_c1979
300 _a253
942 _2ddc
999 _c4648
_d4648