November 2007 [25 June 2018]. (原始内容存档于2015-07-21). Miller, Steve. CaroleHillard dies at 71. Rapid City Journal. 25 October 2007 [27 June 2018]. Obituaries:
Alger, Ingela; Hooper, Paul L.; Cox, Donald; Stieglitz, Jonathan; Kaplan, Hillard S. Paternal provisioning results from ecological change. Proceedings of