38 BOOKS AND PAMPHLETS CONTAINING THE RESULTS OF RESEARCH ON MAJOR POLITICAL, SOCIAL AND ECONOMIC INSTITUTIONS AND ISSUES
AT LEAST BY 1930 AS TO THE MARK "TWENTIETH CENTURY FUND"; MAY 14, 1969, AS TO THMARK "XX." AT LEAST BY 1930 AS TO THE MARK "TWENTIETH CENTURY FUND"; MAY 14, 1969, AS TO THMARK "XX." 20TH CENTURY FUND 20