Chief, Midwest Archeological Center, NPS No description specified. 1-2 (2 Records) Documents Letter Report: Trip Report, Sleeping Bear Dunes National Lakeshore, Archeological Reconnaissance, June 17-19, 1981 (1981) Letter Report: Trip Report-Sleeping Bear Dunes National Lakeshore, July 27 To August 3, 1980 (1980)