오리건 주의 국립자연유산 목록
List of National Natural Landmarks in OregonNational Natural Armarks List of National Natural Armarks에 있는 이것들은 미국 [1]오리건 주에 있는 National Natural Armarks입니다.
레퍼런스
- ^ Hale, Jamie (August 10, 2016). "Oregon Travel News: Oregon's 11 National Natural Landmarks". The Oregonian. Oregonlive / The Oregonian. Retrieved 2017-08-10.
- ^ a b "Horse Ridge Natural Area". Geographic Names Information System. United States Geological Survey. Retrieved 2009-04-05.
- ^ "Lawrence Memorial Grassland Preserve". Conservation Gateway. The Nature Conservancy. Retrieved 2017-08-10.
- ^ "Round Top Butte RNA". Pacific Northwest Interagency Natural Areas Network. Oregon State University, Forestry Sciences Laboratory. Retrieved 2017-08-31.
- ^ https://www.fs.fed.us/pnw/pubs/pnw_gtr895.pdf[베어 URL PDF]
- ^ http://inr.oregonstate.edu/sites/inr.oregonstate.edu/files/2015_or_natural_areas_plan.pdf[베어 URL PDF]