Downs, R. B. (1974). Guide to Illinois library resources. Published in cooperation with the Illinois State Library Association by the American Library Association.
Citace podle Chicago (17th ed.)Downs, Robert Bingham. Guide to Illinois Library Resources. Chicago: Published in cooperation with the Illinois State Library Association by the American Library Association, 1974.
Citace podle MLA (9th ed.)Downs, Robert Bingham. Guide to Illinois Library Resources. Published in cooperation with the Illinois State Library Association by the American Library Association, 1974.
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