To the Editor：The journal ＂impact factor （IF）＂ was conceived by Garfield in 1955 to help librarians identify the most influential journals based on the number of citations,and the first ranking of journals by IF ...To the Editor：The journal ＂impact factor （IF）＂ was conceived by Garfield in 1955 to help librarians identify the most influential journals based on the number of citations,and the first ranking of journals by IF was published in 1972.[1] We systematically analyzed the IFs of emergency medicine journals published in Journal Citation Report （JCR） for the past 10 years （2005-2014）.展开更多
文摘To the Editor：The journal ＂impact factor （IF）＂ was conceived by Garfield in 1955 to help librarians identify the most influential journals based on the number of citations,and the first ranking of journals by IF was published in 1972.[1] We systematically analyzed the IFs of emergency medicine journals published in Journal Citation Report （JCR） for the past 10 years （2005-2014）.
