000 00287nam a2200133Ia 4500
100 _aRoger E.N
_923769
250 _afifth
650 _aEXTN
_923770
942 _cBK
245 _aDiffusion and Innovation
260 _aNew York
_bFree Press
_c2003
082 _a301.243
300 _a551
999 _c410530
_d466994