The USF Tampa Library has a useful site about copyright at http://www.lib.usf.edu/public/index.cfm?Pg=CopyrightInformation.
Two new websites, created by the University of Texas-Austin’s Harry Ranson Humanities Research Center, could also be useful, especially as they build up.
Firms Out of Business (FOB) can be searched for the contact information of copyright holders for out-of-business printing and publishing firms, magazines [...]