4Schramm W.Twenty Years of Journalism Research[J].Public Opinion Quarterly,1957,21(1):91-107.
5Farrar R T.Mass Communications History;A Myriad of Approaches In R.T.Farrar & J,D.Stevens(Eds.),Mass Media And The Na-tional Experience[M].New York:Harper & Row,1957:1-13.
6Atwood R.New Directions for Journalism Historiography[J].Journalism History,1978,5(3):13-16.
7Lee J M.History of American Journalism[M].Boston:Houghton Mifflin Company.;Nelson,W,1917.
8Farrar R T.Ma&s Communications History:A Myriad of Approaches.In R.T.Farrar & J.D.Stevens(Eds.),Mass Media And The Na- tional Experience.New York:Harper & Row,1971:1-13.
9Thomas I.The History of Printing in America:With A Biography of Printers and An Account of Newspapers[M].New York:American An- tiquarian Society,1874/1810.
10Buckingham J T.Specimens of Newspaper Literature:With Personal Memoirs,Anecdotes,and Reminiscences[M].Boston:Charles C. Little and James Brown,1850.
