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→North America
===North America===
===North America===
=== 北美地区 ===
* [http://cnets.indiana.edu/ Center for Complex Networks and Systems Research], Indiana University, Bloomington, IN, USA.
* [http://cnets.indiana.edu/ Center for Complex Networks and Systems Research], Indiana University, Bloomington, IN, USA.
* [https://web.archive.org/web/20110430200327/http://www.ccsr.uiuc.edu/ Center for Complex Systems Research], University of Illinois at Urbana-Champaign, IL, USA.
* [https://web.archive.org/web/20110430200327/http://www.ccsr.uiuc.edu/ Center for Complex Systems Research], University of Illinois at Urbana-Champaign, IL, USA.