000 00291nam a2200109Ia 4500
008 191031s9999 xx 000 0 und d
100 _aRogers Everest M) and Shoemaker (F Floyd)
245 0 _aCommunication of innovation
260 _b"Free Press, New York"
260 _c1971
942 _cBK
999 _c203551
_d203551