Leffler, For the Soul of Mankind: ) ch 2 (pp. 147-151) ; Eisenhower, Vol II, ch 8 "Sputnik"

Zubok, A Failed Empire ; ch 5 (pp,123-143); Volkogonov, ch 3 (pp.222-235)

Fursenko, ch 6, Khrushchev's Comet Sputnik (pp. 138-157)