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.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)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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