Great starting place for articles on the social history of the city. One important print-only journal--Chicago History--is indexed completely here.
America: History & Life is the definitive index of literature covering the history and culture of the United States and Canada, from prehistory to the present. With indexing for 1,700 journals from 1964 to present.
Project MUSE was launched in 1995 by the Johns Hopkins University Press, to offer the full text of JHUP scholarly journals via the world wide web. In 1999, MUSE published online 46 JHUP titles in the humanities, social sciences.