000 00300nam a2200121Ia 4500
008 220201s2007 xx 000 0 eng d
082 _a621.38153-LEA
100 _aLeach, Donald P.
245 0 _aDigital Principles and applications
260 _aNew Delhi
_bTMH
_c2007
300 _a684
942 _2ddc
999 _c64641
_d64641