New serial titles : a union list of serials commencing publication after December 31, 1949 : 1950-1970 cumulative.
Library of Congress.
Joint Committee on the Union List of Serials.
Washington : Library of Congress,
1974 (c1973).
Prepared under the sponsorship of the Joint Committee on the Union List of Serials.
Supplements the Union list of serials.
Periodicals