Underground river -- Tunnels and caverns -- Planning and preparation -- Going deep.
Summary:
""Amazing photography accompanies engaging information about cave exploration. The combination of high-interest subject matter and light text is intended for students in grades 3 through 7"--Provided by publisher"-- Provided by publisher.
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.