You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place Shenandoah National Park, Cresent Rock Overlook ca. 27 air miles south of Front Royal Remove constraint Place: Shenandoah National Park, Cresent Rock Overlook ca. 27 air miles south of Front Royal Place USA Remove constraint Place: USA Place Virginia Remove constraint Place: Virginia Topic Cetrelia Remove constraint Topic: Cetrelia Topic Lichens Remove constraint Topic: Lichens