Robert S. Norris; Thomas B. Cochran (January 1997). US-USSR/Russian Strategic Offensive Nuclear Forces(PDF) (Report). National Resources Defense Council, Inc. p. 16. Archived(PDF) from the original on 23 December 2021. Retrieved 11 March 2023.
Robert S. Norris; Thomas B. Cochran (January 1997). US-USSR/Russian Strategic Offensive Nuclear Forces(PDF) (Report). National Resources Defense Council, Inc. p. 16. Archived(PDF) from the original on 23 December 2021. Retrieved 11 March 2023.