000 00312nam a2200145Ia 4500
008 190201s9999 xx 000 0 und d
082 _a512
082 _b72 SHA
100 _a"Sharma, J. K"
245 0 _aMathematical Models in O
260 _aNew delhi
260 _bT.M.H
260 _c1989
300 _a617
999 _c31135
_d31135