This guide to Historical U.S. Newspapers Online, created by a librarian at Bowling Green University, attempts to provide links to every publicly accessible digitized historical newspaper in the United States. It is organized by state, and then city -- click on a letter to go to the state. There are also links to some resources, like Chronicling America, that allow you to search across many newspapers at once.
If the library location in OskiCat says "Newspapers and Microforms" it is referring to the Newspapers and Microforms Collection, 40 Doe Library.
Check the hours of the unit before you go. The unit is not open on weekends, and microfilm cannot be checked out.
Be sure to bring a flash drive so you can save scanned copies of the microfilm to your disk. Scanning is free, but there is a charge for printing from the microfilm. You must use your Cal1 card to pay for printing.
In the News/Micro collection, microfilm rolls and microfiche cards are shelved with their own numbering system; click here for a PDF of the collection's floorplan.
Don't hesitate to ask for help! The News/Micro staff are experts in the use of the machines.