-. Annual Report of The Librarian of Conggres: For the fiscal year ending June 30, 1972. Goverment Printing Office.
Citace podle Chicago (17th ed.)-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
Citace podle MLA (8th ed.)-. Annual Report of The Librarian of Conggres: For the Fiscal Year Ending June 30, 1972. Goverment Printing Office.
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