Kahn, Miriam B. Protecting your library's digital sources : The essential guide to planning and preservation / by Miriam B. Kahn - New Delhi: Ess Ess Publications, 2010. - xiii, 104p. ISBN: 9788170005926 Subjects--Topical Terms: Computer operationsDigital sourcesLibrary scienceProtecting data Dewey Class. No.: 025.82 / KAH/P