000 00291nam a2200121Ia 4500
100 _aRao, V.K., Reddy, R.S. (ed)
020 _a81-7169-235-4
942 _cBK
245 _aLearning & teaching
260 _aCommonwealth Publishers, New Delhi
_c1992
082 _a371.3 Rao
300 _avi, 287
999 _c61937
_d61937