^"Compound Junior". Collection. Lynden Sculpture Garden. Retrieved 21 March 2012.
^Bradley Family Foundation (2012). "Compound Junior (sculpture)". Inventory of American Sculpture. Smithsonian Institution. Retrieved 12 December 2012.
^Buck, Diane (1995). Outdoor Sculpture in Milwaukee: A Cultural and Historical Guidebook. Madison: The State Historical Society of Wisconsin. pp. 184–185. ISBN0-87020-276-6.