Links
[1] http://www.proquest.com/products-services/dnsa.html
[2] https://edesiderata.crl.edu/providers/proquest
[3] http://www.proquest.com/
[4] http://nsarchive.gwu.edu/NSAEBB/
[5] http://proquest.libguides.com/dnsa/collections
[6] https://edesiderata.crl.edu/system/files/activity_docs/ProQuest%20Terms%20and%20Conditions%20version%202-5-2014.pdf
[7] http://media2.proquest.com/documents/casestudy_dnsa_kinney.pdf
[8] http://charleston.publisher.ingentaconnect.com/content/charleston/chadv/2005/00000006/00000003/art00011