000 00318nam a2200121Ia 4500
008 220201s1987 xx 000 0 eng d
082 _bSHA
100 _aSharma, Jagdish and Grover, D R
245 0 _aRefrence service and sources of information
260 _bESS ESS Publication
_c1987
300 _a288
942 _2ddc
999 _c25536
_d25536