The subscription resources marked with a padlock are available to researchers on-site at the Library of Congress. If you are unable to visit the Library, you may be able to access these resources through your local public or academic library.
HathiTrust is a digital repository for the nation's great research libraries that brings together the immense collections of its partner institutions. Initially conceived as a collaboration between the thirteen universities of the Committee on Institutional Cooperation, the University of California system, and the University of Virginia in order to establish a repository for those universities to archive and share their digitized collections, HathiTrust quickly expanded to include additional partners with a fast growing treasure of digitized collections.
Additional content and features are available to researchers and staff with patron accounts. Log In by clicking on the button in the upper right of the Hathi Trust website and following the instructions. Additional information is available here: HathiTrust Authentication Help