Annual report of the Librarian of Congress for the fiscal year ended ... .
Library of Congress.
Washington : United States Government Printing Office,
1939-
Title varies slightly.
Reports for 1938-19  end June 30;  end Sept. 30.
Library of Congress
Libraries
Issued also to depository libraries in microfiche.
Annual report of the Librarian of Congress for the fiscal year ended ...

Report of the Librarian of Congress for the fiscal year ending June 30 ...