The Final Months of the War With Japan
- An intelligence monograph by Douglas J. MacEachin. Signals Intelligence, U.S. Invasion Planning, and the A-Bomb Decision
- https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/the-final-months-of-the-war-with-japan-signals-intelligence-u-s-invasion-planning-and-the-a-bomb-decision/csi9810001.html

The Atomic Bomb, 1939-1945
- Article, image galleries and links.
- http://www.worldwar2database.com/html/atombomb.htm

National Security Archive
- Collection of primary source material relating to the use of the atomic bomb in PDF format available from George Washington University.
- http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB162/index.htm

Swords and Ploughshares
- Collection of articles relating to the use of the atomic bomb on Japan, Volume IX / Number 3 & 4 / Spring-Summer 1995.
- http://www.acdis.uiuc.edu/Research/S&Ps/1995-Sp-Su/S&P_Sp-Su_1995.html

Atom Bomb
- A brief historical article on the bomb, includes links to articles on related material, definitions, and quotations from primary sources.
- http://www.spartacus.schoolnet.co.uk/2WWatom.htm

Fifty Years from Trinity
- Articles from the Seattle Times to mark the fiftieth anniversary of the first nuclear test.
- http://seattletimes.nwsource.com/trinity/

Harnessing of Nuclear Fission - The Story of the Atomic Bomb
- Brief article on the atomic scientists and their experiments from 1934-1945.
- http://www.3rd1000.com/nuclear/cruc18.htm

Nuclear Weapons - History
- Large, comprehensive collection of online documents relating to the bombing and the issues surrounding it.
- http://www.nuclearfiles.org/menu/key-issues/nuclear-weapons/history/

Truman’s Motivations: Using the Atomic Bomb in the Second World War
- Research paper examining the motivations for using the atomic bomb against Japan.
- http://www.johnwcooper.com/papers/atomicbombtruman.htm

A-Bomb - The Destroyer of Worlds
- Includes Trinity today, timeline, history, the theory, reasoning, considerations, and the aftermath.
- http://www.kilroywashere.org/004-Pages/Trinity/Trinity.html

The Last Wave from Port Chicago
- Details of the July 17, 1944 explosion at the Port Chicago Naval Magazine, including documents and circumstances that point to the possibility of the first ever nuclear explosion.
- http://www.portchicago.org/

Hiroshima: Was it Necessary?
- Article and quotes which explore the premise that the a-bombings were probably not necessary to conclude the war, and includes diary excerpts from Truman and Stimson, bibliography, biographies of major figures, and links.
- http://www.doug-long.com/

Atomic Central
- A collection of material on the development and use of the atomic bomb as well as the effects on society of the existence of the bomb, and includes photos, video clips, atomic tests, accidents and links.
- http://www.vce.com/atomcentral.html

Hiroshima: Was It Absolutely Necessary?
- An account that summarizes the events that led to Japan's surrender, and considers other means of achieving surrender by Doug Long.
- http://www.spectacle.org/696/long.html

Atomic Bombs
- A large collection of links to information relating to the atomic bombing.
- http://www.japan-guide.com/e/e2125.html

United States Strategic Bombing Survey: Summary Report (Pacific War)
- Original text of the report on the conduct of the bombing campaign against Japan outlining the factors which influenced decisions in planning, and describes the effects of the atomic bombing in the context of the overall bombing campaign.
- http://www.anesi.com/ussbs01.htm

Official Bombing Order
- Authorized the use of the atomic bomb against Japanese cities, drafted by General Groves and approved by President Truman and Secretary of War Stimson at Potsdam on July 25, 1945.
- http://www.dannen.com/decision/handy.html

CSI Hiroshima Live Project
- Multimedia presentation on the annual Hiroshima Peace Memorial Ceremony, and includes photographs, audio and video clips, and text of the ceremony with material translated into several languages.
- http://www.csi.ad.jp/hiroshima-live/

When the Earth Caught Fire
- This examination of popular news media in the months after the atomic bombing of Japan demonstrates the highly contradictory emotions of American scientists, politicians, and the public toward atomic armaments.
- http://mcel.pacificu.edu/as/students/gaskill2/bomb.html

Trinity Site
- Full text and photos of a brochure issued by the U.S. Department of Energy, National Atomic Museum in Albuquerque, New Mexico, January 1994.
- http://www.ninfinger.org/~sven/trinity/trin_brochure.html

The Decision to Use the Atomic Bomb
- A well-referenced study of the American decision to use the atomic bombs on Hiroshima and Nagasaki by Louis Morton.
- http://www.army.mil/cmh-pg/books/70-7_23.htm