Digital advances begun at the outset of the 21st century have significantly eased the burden on researchers, who no longer have to travel great distances to see topic-relevant source material. Dissertations, journals, documents, and photos that have been preserved digitally are available internationally. Moreover, with the right access codes, such images and data are available for viewing at any time. Certainly, electronic developments are valuable also to librarians, who now rely much less on interlibrary loan and can serve a much wider variety of patron requests immediately.
http://reviews.libraryjournal.com/2011/12/reference/best-databases-2011-librarians-decide-which-databases-make-the-grade/
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