000 00258nam a2200109Ia 4500
008 190719s9999 xx 000 0 und d
100 _aP K Ghosh/Y K Bhushan
245 0 _aGeneral comm. Knowledge
250 _a4th
260 _aDelhi
_bS Chand
_c1972
942 _cBK
999 _c784
_d784