designation) Gallery of National Park "Welcome" Signs (页面存档备份,存于互联网档案馆) National Park Service Meeting Notices and Rule Changes from The Federal Register RSS Feed
Release. 2009-05-20 [2009-08-12]. (原始内容存档于2010-05-06). Columbia University Dedicates Its 17-Acre Manhattanville Campus. Press Release. 2016-10-24 [2016-11-16]
(原始内容存档于2015-01-14). Mayor Giuliani Announces Amount of Parkland in New York City has Passed 28,000-acre Mark. New York City Mayor's Office. 1999-02-03 [2008-09-01]
Giétro and Glacier de Corbassière. Laboratory of Hydraulics, Hydrology and Glaciology. Swiss Federal Institute of Technology, Zurich. 2011-07-07 [2012-08-31]