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As libraries, archives, and museums make unique digital collections openly available via digital library platforms, they expose these resources to users who may wish to cite them. Often several URLs are available for a single digital object, depending on which route a user took to find it, but the chosen citation URL should be the one most likely to persist over time. Catalyzed by recent digital collections migration initiatives at Indiana University Libraries, this study investigates the prevalence of persistent URLs for digital objects at peer institutions and examines the ways their platforms instruct users to cite them. This study reviewed institutional websites from the Digital Library Federation's (DLF) published list of 195 members and identified representative digital objects from unique digital collections navigable from each institution's main web page in order to determine persistent URL formats and citation options. Findings indicate an equal split between offering and not offering discernible persistent URLs with four major methods used: Handle, DOI, ARK, and PURL. Significant variation in labeling persistent URLs and inclusion in item-specific citations uncovered areas where the user experience could be improved for more reliable citation of these unique resources. [ABSTRACT FROM AUTHOR]

The transition from mechanical printing to electronic information dissemination amounts to a digital renaissance, enabling primary source documents to be reborn as electronic resources. For history scholars, this presents opportunities and challenges for preserving centuries-old original texts in a digital environment, supporting downloading and digital access and presenting original research. The Post-Reformation Digital Library (PRDL) serves as a case study, capturing a select set of resources on theology and philosophy of the 15th to 18th centuries from a variety of physical locations and digital libraries. Through digitization, digital access and systematic cataloging, the PRDL -- along with the database, social networking and dedicated website it has prompted -- are helping to overcome barriers to access. Though a modest initiative, the progress of the PRDL demonstrates possibilities for rediscovering historical materials and making them available for modern scholarly studies. [ABSTRACT FROM AUTHOR]