Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WGTD FM 91.1, University Forum with Gerald Greenfield, December 5, 1990.Bởi Oliver S. Hayward

Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WLIP AM 1050, Lip Service, 1991.Bởi Oliver S. Hayward

Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WLIP AM 1050, December 30, 1993.Bởi Oliver S. Hayward

Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WLIP AM 1050, UW-Parkside Report, April, 1994.Bởi Oliver S. Hayward

Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WGTD FM 91.1, November 12, 1995.Bởi Oliver S. Hayward

Interview with Professor Oliver S. Hayward of University of Wisconsin-Parkside on WGTD FM 91.1, July 9, 1996.Bởi Oliver S. Hayward