Great Plains: Perbezaan antara semakan

| population = | population_date =

| population_density =

| map_caption = Anggaran taburan Great Plains<ref name=Encyclopedia>Wishart, David. 2004. The Great Plains Region, In: ''Encyclopedia of the Great Plains'', Lincoln: University of Nebraska Press, pp. xiii-xviii. ISBN 0-8032-4787-7</ref>

| website =[http://memory.loc.gov/ammem/award97/ndfahtml/ngphome.html Library of Congress] (US)