00404nam a2200145Ia 4500001000400000008004100004020001400045040001300059082001800072100002100090245009100111260003800202300001100240546000700251697140312s9999    xx            000 0 und d  a333511581  cPK-LaUMT  a 330.1bPER-I  aMichael Perelman  a"Information, social relations and the economics of high technology"cMichael Perelman  a"London,UK:"b"Macmillan,"c1991.  a242 p.  aEN