00371nam a2200157Ia 45000010005000000080041000050200018000460400013000640820020000771000023000972450049001202600009001693000011001785460007001896500017001968487140324s9999    xx            000 0 und d  a0-02-926650-5  cPK-LaUMT  a 303.484bROG-D  aRogers, Everett M.  aDiffusion of innovationscRogers, Everett M.  c1983  a453 p.  aEN  aDiffusion of