You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Prairie Slough Conservation Area, ca 5 mi NE of Elsberry, off of Rt P, Hamburg 7.5' Quad. Remove constraint Place: Prairie Slough Conservation Area, ca 5 mi NE of Elsberry, off of Rt P, Hamburg 7.5' Quad. Topic Poales Remove constraint Topic: Poales