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

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

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

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

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

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