Ash, L. (1958). Subject collections: A guide to special book collections and subject emphases as reported by university, college, public and special libraries in the United States, the Territories, and Canada. Bowker.
Παραπομπή σε μορφή Chicago (17η εκδ.)Ash, Lee. Subject Collections: A Guide to Special Book Collections and Subject Emphases as Reported by University, College, Public and Special Libraries in the United States, the Territories, and Canada. New York: Bowker, 1958.
Παραπομπή σε μορφή MLA (8th εκδ.)Ash, Lee. Subject Collections: A Guide to Special Book Collections and Subject Emphases as Reported by University, College, Public and Special Libraries in the United States, the Territories, and Canada. Bowker, 1958.
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