00369nam a2200133Ia 4500001000500000005001700005008004100022020001500063082001600078100002200094245006100116260001900177650003900196499620261006003828.0120911s9999    xx            000 0 und d  a0684840014  a302.209 ROG  aRogers, Everett M  aA history of communication study:a biographical approach  aThe Free Press  aCommunication-history-19th century