哨兵系統 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "哨兵系統" in Chinese language version.

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hohmanntransfer.com

Jon Giorgini. Understanding Risk Pages. Columbine, Inc. (hohmanntransfer). 30 July 2002 [2011-11-21]. （原始内容存档于2018-06-23）.
Jon Giorgini. Understanding Risk Pages. Columbine, Inc. (hohmanntransfer). 30 July 2002 [2011-11-21]. （原始内容存档于2018-06-23）.

Sentry Risk Table. NASA/JPL Near-Earth Object Program Office. 14 Oct 2011 [2011-10-14]. （原始内容存档于2013-05-20）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
Sentry Notes. NASA/JPL Near-Earth Object Program Office. 2013-08-12 [2013-08-26]. （原始内容存档于2016-12-12）.

Jon Giorgini. Understanding Risk Pages. Columbine, Inc. (hohmanntransfer). 30 July 2002 [2011-11-21]. （原始内容存档于2018-06-23）.
Jon Giorgini. Understanding Risk Pages. Columbine, Inc. (hohmanntransfer). 30 July 2002 [2011-11-21]. （原始内容存档于2018-06-23）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
IMPACT RISK ASSESSMENT: AN INTRODUCTION. NASA/JPL Near-Earth Object Program Office. 31 Aug 2005 [2011-10-14]. （原始内容存档于2017-01-06）.
Sentry Notes. NASA/JPL Near-Earth Object Program Office. 2013-08-12 [2013-08-26]. （原始内容存档于2016-12-12）.

Sentry Risk Table. NASA/JPL Near-Earth Object Program Office. 14 Oct 2011 [2011-10-14]. （原始内容存档于2013-05-20）.