The contents of the University of Colorado Digital Library are available for your use in research, teaching, and private study. Some of these items are protected by the U.S. Copyright Law (Title 17, U.S.C.) and some items may have additional restrictions. If you use the items in this collection, make sure you abide by any restrictions stated in the descriptive data window. The nature of these collections often makes it difficult to determine the copyright status of an item. We have made every effort to provide information about copyright owners and other restrictions in the descriptive data window. Ultimately, however, it is your responsibility to use the item according to the terms governing its use. If you are a copyright holder and the information is either not listed or listed incorrectly, please let us know so that we can update the information on our site.