Stephen G. Wheatcroft; Davies R. W.; Cooper J. M. (1986). „Soviet Industrialisation Reconsidered: Some Preliminary Conclusions about Economic Development between 1926 and 1941.”. Economic History Review. 39 (2): 264. doi:10.1111/j.1468-0289.1986.tb00406.x.
Thus, the plan for the production of pig iron was fulfilled by 62%, steel – by 56%, rolled products – by 55%, and for coal – by 86%. (Source:Vitaly Lelchuk. Industrialisation)
"The enthusiasm and dedication of millions of people during the first five-year plan is not an invention of Stalinist propaganda, but the undoubted reality of that time". See: Vadim Rogovin. Was There an Alternative? Moscow: Iskra-Research, 1993
Vyacheslav Rodichev, Galina Rodicheva. „Tractors and Cars”. Архивирано из оригинала 2008-06-08. г. 2nd edition. Moscow: Agropromizdat, 1987.
According to calculations made by CIA specialists in 1988, the average annual GDP growth rate was 6.1%. See Vadim Rogovin. World Revolution and World War. Chapter 1