https://www.amazon.com/Taking-K-129-Russian-Operation-History/dp/1101984457/ref=sr_1_1?keywords=9781101984444&linkCode=qs&qid=1568402822&s=books&sr=1-1

https://www.amazon.com/Project-Azorian-CIA-Raising-K-129-ebook/dp/B004P1JENO/ref=sxbs_sxwds-stvp?keywords=9781101984444&linkCode=qs&pd_rd_i=B004P1JENO&pd_rd_r=fb351b7a-c08c-4f74-a958-53e5b0fd879d&pd_rd_w=KqD7j&pd_rd_wg=GIAnL&pf_rd_p=a6d018ad-f20b-46c9-8920-433972c7d9b7&pf_rd_r=FYW0HBPJJZG6QVRS20E0&qid=1568402632&s=books

https://www.cia.gov/about-cia/cia-museum/experience-the-collection/text-version/stories/project-azorian.html

https://www.bbc.co.uk/news/resources/idt-sh/deep_sea_mining

https://www-pub.iaea.org/MTCD/publications/PDF/te_1242_prn.pdf

https://flot.com/history/si58.htm

https://defensionem.com/operation-azorian/

http://russianships.info/eng/submarines/project_629.htm

https://nsarchive2.gwu.edu//nukevault/ebb305/index.htm