Bulletin of the Atomic Scientists:   http://www.thebulletin.org

International Physicians for the Prevention of Nuclear War:   http://www.ippnw-italy.org/

Pugwash Conferences On Science And World Affairs:   http://www.pugwash.org/

Reppy Institute for Peace and Conflict Studies - Cornell University: http://pacs.einaudi.cornell.edu/about-us-1

Student Pugwash:   https://isyp.org/

Unione Scienziati Per Il Disarmo ONLUS:  http://www.uspid.org/