found: Work cat.: Davies, P. F-105 Wild Weasel vs SA-2 "Guideline" SAM, Vietnam 1965-73, 2011.
found: Wikipedia, 11 July 2011:under S-75 Dvina (the S-75 Dvina, NATO reporting name SA-2 Guideline, is a Soviet-designed surface-to-air missile system; this system first gained fame when an S-75 battery shot down a U-2 overflying the Soviet Union in 1960; later, North Vietnamese forces used the S-75 extensively during the Vietnam War to defend Hanoi and Haiphong)
found: Brittanica online, 11 July 2011:under SA-2 Guideline (the SA-2 Guideline, introduced in 1958, was the most widely deployed of the early SAMs and was the first surface-to-air guided-missile system used in combat)
