Ransome, Arthur. Russia in 1919. New York: B.W. Huebsch, 1919. Print.

This is a valid source because it provides a detailed firsthand account of what life was like during 1919.

Fitzpatrick, Sheila. Education and Social Mobility in the Soviet Union, 1921-1934. Cambridge, Eng.: Cambridge UP, 1979. Print.

This was an extremely helpful source because it provides accurate and detailed accounts of Soviet education during the 20s and 30s.