Relief shown by contours. "Prepared in cooperation with the National Park Service." "National geodetic vertical datum of 1929." "SIM 3414" and "2019" on cover of envelope. Shipping list no.: 2022-0237-P. Includes location map. Includes bibliographical references in pamphlet (pages 16-20).
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.