Moul, F. (2006). The national grasslands: A guide to America's undiscovered treasures. University of Nebraska Press.
Lua i Stíl Chicago (17ú heag.)Moul, Francis. The National Grasslands: A Guide to America's Undiscovered Treasures. Lincoln: University of Nebraska Press, 2006.
Lua MLA (9ú heag.)Moul, Francis. The National Grasslands: A Guide to America's Undiscovered Treasures. University of Nebraska Press, 2006.
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