R-36 / SS-9 SCARP

References

• The Soviet Land-based Ballistic Missile Program, 1945-1972 An Historical Overview Vincent J. Wilson, Jr. Chief, Cryptologic History Program, [1973] United States Cryptologic History, Special Series Number ___ [NOFORN TOP SECRET UMBRA, released ]
• The Soviet Land-based Ballistic Missile Program, 1945-1972 An Historical Overview Vincent J. Wilson, Jr. Chief, Cryptologic History Program, [1973] United States Cryptologic History, Special Series Number ___ [NOFORN TOP SECRET UMBRA, released ]
• Russian Strategic Nuclear Weapons, Pavel Podvig, ed., IzdAT, Moscow, 1998, 492 pp. (in Russian). Authors: Oleg Bukharin, Timur Kadyshev, Eugene Miasnikov, Pavel Podvig, Igor Sutiagin, Maxim Tarasenko, Boris Zhelesov
• R-36 @ Encyclopedia Astronautica by Mark Wade
• SS-9 Scarp @ US Naval Institute Military Database
• "A History of Strategic Arms Competition 1945-1972" (U), Volume 3, A Handbook Of Selected Soviet Weapon and Space Systems, United States Air Force, June 1976. pgs 162-167