气象机
参考资料

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1 2 3 4  McInerny, Vivian. . The Oregonian (Portland, Oregon). 1988-10-16: L01.
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1 2  Hortsch, Dan. . The Oregonian (Portland, Oregon). 1998-08-07: D02.
1 2  . Pioneer Courthouse Square.   [2016-11-11]. （原始内容存档于2016-11-11）.
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1 2  Nicholas, Jonathan. . The Oregonian (Portland, Oregon). 1995-01-11: D01.
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1 2 3  McInerny, Vivian. . The Oregonian (Portland, Oregon). 1988-10-16  [2020-06-20]. （原始内容存档于2013-11-11）.
↑  Pintarich, Paul. . The Oregonian (Portland, Oregon). 1989-08-07: C06.
1 2  Garcia, Edwin. . The Oregonian (Portland, Oregon). 1988-08-25: A01.
1 2 3 4 5  . The Oregonian (Portland, Oregon). 1988-08-26: C12.
1 2 3  Saker, Anne. . The Oregonian (Portland, Oregon). 2012-03-21  [2020-06-20]. （原始内容存档于2013-11-11）.
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↑  Gragg, Randy. . The Oregonian (Portland, Oregon). 1994-05-04: A06.
1 2  Farrell, Peter. . The Oregonian (Portland, Oregon). 1989-05-22: D07.
↑  Filips, Janet. . The Oregonian (Portland, Oregon). 1988-10-02: L01.
1 2 3 4 5 6 7 8 9 10 11  Garcia, Edwin. . The Oregonian (Portland, Oregon). 1988-09-01: B02.
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↑  Wood, Shelby. . The Oregonian (Portland, Oregon).   [2020-06-20]. （原始内容存档于2013-11-11）.
1 2 3  . Portland Parks & Recreation.   [2020-06-20]. （原始内容存档于2013-03-10）.
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1 2  Richard, Terry. . The Oregonian (Portland, Oregon). 1997-12-10: C09.
↑  Samson, Karl. . John Wiley & Sons. 2010: 96  [2020-06-20]. ISBN 978-0-470-64572-7. （原始内容存档于2020-06-21）.
↑  . SIGUCCS.   [2018-09-04]. （原始内容存档于2018-09-04）.
↑  Federman, Stan. . The Oregonian (Portland, Oregon). 1989-03-30: 04.
1 2  . The Oregonian (Portland, Oregon). 1995-12-01: C01.
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↑  Butler, Grant. . The Oregonian (Portland, Oregon). 2002-06-28: 17.
↑ 游客指南：
Burgess, Ann Carroll. . ECW Press. 2003: 13  [2020-06-20]. ISBN 1-55022-586-3. （原始内容存档于2020-06-22）.
. U.S. News & World Report.   [2016-10-05]. ISSN 0041-5537. （原始内容存档于2016-10-05）.
Sharp, David. . Via. AAA Northern California, Nevada & Utah. 2012-09  [2016-03-24]. （原始内容存档于2016-03-24）.
↑ 徒步旅行：
Hunt, Phil. . The Oregonian (Portland, Oregon). 1989-04-14: H24.
Vecchioni, Heather. . Livestrong Foundation. 2010-12-07  [2013-01-28]. （原始内容存档于2013-01-28）.
↑  Fravel, Nicole. . AOL. 2010-08-27  [2020-06-20]. （原始内容存档于2013-09-30）.
雕塑上有两个青铜风速计，图上显示的金属符号是代表毛毛雨或过渡天气的大蓝鹭
2011年占领波特兰抗议活动期间从北面拍下的气象机照片