00438nam a22001457i 4500001001000000005001700010008004100027082002000068100002000088245005100108260006100159300001700220650003700237020001800274SXC02266220260819093726.0260101s1988    ii            000 0 eng d  a512.9 GRA-L222  aGray, Peter M D10aLogic, algebra and database /cGray, Peter M D  abAffiliated East-West Press Pvt. Ltd., New Delhi,c1988  ap. ;c22 cm. 0aPedagogical algebra; Mathematics  a9780470202593