@book{277502,
	author = {United States.},
	title = {Exploring Yellowstone.},
	publisher = {National Park Service, U.S. Department of the Interior,},
	year = {2018.},
	address = {[Washington, D.C.] :},
	edition = {Last updated 2018.},
	note = {Relief shown by shading and spot heights.}
}