{"id":"000028255","type":"book","title":"Pollen analysis of Peat from a sinkhole in the Garden Peninsula, Delta County, Michigan. - Ann Arbor, MI","container-title":"The Michigan botanist ; 16.1977, no. 2, S. 55-62 : 4 Ill","author":[{"family":"Kapp","given":"Ronald O."}],"issued":{"raw":"1977"}}