@techreport{sayre_new_2009,
	type = {U.{S}. {Geological} {Survey} {Professional} {Paper}},
	title = {A {New} {Map} of {Standardized} {Terrestrial} {Ecosystems} of the {Conterminous} {United} {States}},
	url = {https://pubs.usgs.gov/pp/1768/},
	number = {1768},
	urldate = {2023-07-04},
	institution = {U.S. Geological Survey},
	author = {Sayre, Roger and Comer, Patrick and Warner, Harumi and Cress, Jill},
	year = {2009},
	keywords = {Terrestrial Ecoregions (CEC 1997)},
}

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