Donor Imposed Restrictions upon Materials in our Holdings Please note that dissemination of some documents - including images, sound, cartographic, textual, or electronic materials - found in our holdings may be restricted by donor agreement. To purchase a copy of these materials, you must obtain permission from the donor. We have provided a Source and Permissions Contact List for some motion pictures, sound and video which may assist you. If you have questions about this process, please contact us. 