IUPUI site on obtaining permissions
http://www.copyright.iupui.edu/permsec.htm
In 1994, IUPUI (Indiana University- Purdue University- Indianapolis), formed the Copyright Management Center (CMC). It was the first office of its kind at any college or university in the United States. Its purpose is to serve its constituents in “the management of copyright issues arising in the creation of original works and in the use of existing copyrighted works for teaching, research, and service.”
IUPUI site concerning denied usage requests
http://copyright.iupui.edu/permdeadend.htm
Dealing with a dead end? You may not be able to identify or locate a copyright owner, or you may be frustrated because you have not received a response from a copyright owner. Helpful advice and alternatives are provided at this link.
Copyright Clearance Center (CCC)
http://www.copyright.com/
The Copyright Clearance Center is a provider of copyright licensing systems and compliance solutions. The Copyright Clearance Center represents authors, publishers, and other owners of copyright-protected information. Their goal is to provide a single source for licensed access to copyrighted works. At this site you can learn about Pay-Per-Use Services which includes their academic permission service (APS), electronic course content service, transactional reporting service, digital permission service, and republication licensing service. You can also access Academic FAQ’s.