Papers of the American journalist, diplomat, Librarian of Congress. Incoming personal correspondence addressed to Young and his wife, May. Notes of congratulations on his wedding, responses to invitations, and letters concerning Mrs. Young's efforts to collect and publish her husband's writings after his death.
Papers of the American educator, author. Yefroikin also used the name S. Efron. Collection includes correspondence, 1912-1966; memorabilia, 1902-1968; and manuscripts, 1920-1968, relating to Yefroikin's writings and to Jewish secular education, particularly the Workmen's Circle schools. Correspondents include Chaim Grade and Melech Ravitch.