Erickson, E. W. (1961). College and university library surveys 1938-1952. American Library Association.
Chicago-referens (17:e uppl.)Erickson, Ernest Walfred. College and University Library Surveys 1938-1952. Chicago: American Library Association, 1961.
MLA-referens (8:e uppl.)Erickson, Ernest Walfred. College and University Library Surveys 1938-1952. American Library Association, 1961.
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