This series focuses on various collaborative efforts with institutes and governments that Pushpa Mittra Bhargava actively participated in. It contains correspondence, memoranda, and other official documents of significance. The series is divided into three subseries. Details on each of the subseries are given below.

Subseries 1: Collaboration between Centre for Cellular and Molecular Biology (CCMB), Council of Scientific and Industrial Research (CSIR) and National Institutes of Health (NIH)

The initial discussions on a collaboration were initiated between the Centre for Cellular and Molecular Biology (CCMB), Hyderabad, India, and the National Institutes of Health (NIH), located in Bethesda, Maryland, USA. On 3 March 1982, PM Bhargava sent the draft version of the proposal to Dennis O Johnson, the Scientific and Technological Attache for the American Embassy. In 1985, the Council of Scientific and Industrial Research (CSIR) came on board as a collaborative party. The final Memorandum was executed in 1986 between CSIR and NIH.

Subseries 2: Collaboration between Council of Scientific and Industrial Research (CSIR) and Imperial Cancer Research Fund (ICRF)

This subseries contains files about the collaboration between the Council of Scientific and Industrial Research (CSIR) in New Delhi, India, and the Imperial Cancer Research Fund (ICRF) in London, United Kingdom. This contains copies of the drafts of the memoranda and official papers, including handwritten, photocopied, and original letters. However, there is no copy of the final signed memorandum in this subseries.

Subseries 3: Collaboration between India and the Union of Soviet Socialist Republics (USSR)

The subseries contains files about the scientific and technological collaboration between India and the Union of Soviet Socialist Republics (USSR). PM Bhargava visited the Soviet Union to engage in discussions with eminent scientists there and establish a collaborative partnership. This series includes correspondence between PM Bhargava and Nurul Hasan, the Ambassador at the Embassy of India in Moscow, USSR, as well as Prabhakar Lavakare, who served on the National Bio-Technology Board of the Department of Science and Technology. The final memorandum was executed by the Prime Minister of India and the General Secretary of the USSR in Moscow on 3 July 1987, and a photocopy was sent to PM Bhargava.