000 00291pam a2200133 a 4500
020 _c
041 _aeng
100 _aRichard Johnson.
245 _aDiscrete Mathamatics
_hTextual Documents
250 _a6th.
260 _aNew Delhi
_bPearson Education
300 _a688p.
930 _a16133
999 _c93033
_d93033