Sipprell’s photographs are held in the Amon Carter Museum in Fort Worth, TX. Syracuse University also has a collection of her photographic prints.
In the “Life Congratulates” Section for Ives’s 75th birthday. On assignment from <i>Life</i> magazine. Taken in the New York home of the Iveses. In <i>Photographs, 1934-1975</i>, Hill states that this photograph was "a particular favourite of Smith’s" (164).
Mack Burk, James and Michael J. Budds. <i>A Charles Ives Omnibus</i>, 50. Hillsdale, New York: Pendragon Press, 2008. * Bogan Liquor. Advertisement. <i>El Commercio</i> [Quinto, Ecuador] (July 7, 1970): 10. * Perlis, Vivan. <i>Charles Ives Remembered: an Oral History</i>. New Haven, CT: Yale University Press, 1974. See B0687: 42-44. * <i>Photographs, 1934-1975</i>,<br>edited by Gilles Mora and John T, 165. Hill. Paris: Editions du Seuil, 1998; English translation: London: Thames and Hudson, Ltd., 1998, and New York: Harry N. Abrams, 1998. * Also reproduced: numerous times on other recording covers, and in books.
Several mentions of Ives, especially regarding The Unanswered Question that her teacher, Henry Brant, introduced to her.