ProQuest六种历史报纸数据库

试用地址：http://search.proquest.com/news?accountid=13151

试用截止日期：2016年4月15日

本次试用包含以下内容：

ProQuest Historical Newspapers: Chicago Tribune
ProQuest Historical Newspapers: Los Angeles Times
ProQuest Historical Newspapers: New York Tribune / Herald Tribune
ProQuest Historical Newspapers: The Guardian and The Observer
ProQuest Historical Newspapers: The New York Times with Index
ProQuest Historical Newspapers: The Washington Post