Research material 1976-1980
Warner, Barbara R., 1924-. Letter to Ray Allen Billington, 1903-1981 1977, July 25
Warner, Barbara R., 1924-. Letter to Ray Allen Billington, 1903-1981 1978, Feb. 11
Warner, Barbara R., 1924-. Letter to Ray Allen Billington, 1903-1981 1978, Aug. 4
Warner, Barbara R., 1924-. Letter to Ray Allen Billington, 1903-1981 1978, Oct. 14
Warner, Barbara R., 1924-. Letter to Ray Allen Billington, 1903-1981 1980, Oct. 15
Research material 1980)-[undated]