000 00295nam a2200121Ia 4500
100 _aGray, Peter M. D.
020 _a81-85095-82-5
942 _cBK
245 _aLogic, algebra and databases
260 _aAffiliated East-West Press Pvt Ltd, New Delhi
_c1984
082 _a510 Gra
300 _a294
999 _c67307
_d67307