The Rice Digital Scholarship Archive is a locally managed digital archive collection. It includes digitized versions of items from the Woodson Research Center (Fondren Library's special collections), published articles and/or presentations by Rice faculty and staff, and Rice Phd theses.
Look at the abstract-level record for the item you wish to use. It will look something like this.
Copy the URL from the navigation bar of your browser. The Rice Digital Scholarship Archive does not require the proxy prefix.