Iowa State Preserves Board, Des Moines, IA No description specified. 1-2 (2 Records) Documents Cultural Resource Survey of the Elwick Tracts and the Sny Magill-North Cedar Creek Drainages in Clayton County, Iowa (1977) Culturalres Ource Survey of the Elwick Land Tracts and the Sny Magill-North Cedar Creek Drainages in Clayton County, Iowa (1977)