The 1956 U.S. heavy-water supplyagreement may be found here.

Here is a 1992 UN report titled South Africa’s Nuclear-Tipped Ballistic Missile Capability.

From IFP. See IR-8 centrifuges.

I love history, and I always like primary sources. In 2008, CSIS published these audio files of interviews with key players in US-UK nuclear cooperation.

This just never gets old. From Protect and Survive:

After a nuclear attack, there will be a short period before fall-out starts to descend. Use this time to do essential tasks.

Nor groundbreaking, but I think it’s worth highlighting this Chinese statement to the CD:

Emphasizing his delegation’s support for the total elimination of nuclear weapons, he said China is committed to not being the first to use them, threaten their use, or use them against non‑nuclear‑weapon States. However, the disarmament process must be gradual and enjoy consensus among all stakeholders, he stressed…. China supports the drafting of a fissile material cut‑off treaty in the Conference on Disarmament, he said.

Here are selected matters of which the UNSC is seized:

Small arms (24 September 1999; 5 February 2020).

Non-proliferation of weapons of mass destruction (22 April 2004; 27 September 2021).

Non-proliferation (29 March 2006; 30 June 2021)

Threats to international peace and security caused by terrorist acts (12 September 2001; 19 August 2021).

Non-proliferation/Democratic People’s Republic of Korea (14 October 2006; 11 December 2019).

The India-Pakistan question (6 January 1948; 5 November 1965)

The situation between Iran and Iraq (26 September 1980; 31 January 1991).

The situation in the India/Pakistan subcontinent (4 December 1971; 27 December 1971).

In January, Muhammad Omar, Pakistan’s First Secretary to the UN in Geneva, gave the most recent iteration of Islamabad’s explanation concerning the Khan network debacle:

The so-called Network comprised of several people from over two dozen countries spanning four continents. A.Q. Khan‟s involvement in this international network was an individual act, not sanctioned by the State of Pakistan. 

Pakistan thoroughly investigated his involvement and shared its findings with the IAEA and other concerned countries. It helped in exposing the international associates of this clandestine supply network and he was placed under strict restrictions which remain in place to this day. Other countries‟ nationals involved with the network did not meet the same fate and in most cases escaped punishment altogether. The AQ Khan issue is a closed chapter. Since this incident, Pakistan has taken a series of effective measures to preclude any possibility of such an occurrence in the future. 

This document submitted by Pakistan to the IAEA in 1978 has some Information about the country’s nuclear power program.

This statement from India’s PermRep to the CD explains that

India, is [sic] a responsible nuclear weapon State and as per its nuclear doctrine, follows a policy of maintaining a credible minimum deterrence, based on a no-first-use posture and non-use of nuclear weapons against non-nuclear weapon States.