Caption title.
"March 2003"--P. [1].
"U.S. Department of the Interior, U.S. Geological Survey"--P. [1].
"NASA"--P. [1].
Description based on content as of: Sept. 18, 2003; title from resource itself.
Electronic reproduction. [Reston, Va?] : U.S. Geological Survey Mode of access: World Wide Web. Available in multiple electronic file formats.