The perpetual march :
an administrative history of Effigy Mounds National Monument /
by Jill York O'Bright.
APA Citation
O'Bright, J. York., United States. National Park Service. Midwest Region. (19891990). The perpetual march: an administrative history of Effigy Mounds National Monument. Omaha, Neb.: National Park Service, Midwest Regional Office.
MLA Citation
O'Bright, Jill York, and United States. National Park Service. Midwest Region. The Perpetual March: an Administrative History of Effigy Mounds National Monument. Omaha, Neb.: National Park Service, Midwest Regional Office, 19891990.
Warning: These citations may not always be complete (especially for serials).