Nove, Alec. An Economic History of the USSR 1917–1991. Penguin Books. 1992: 88–89. Nove notes that the harvest in 1913 was during an "extremely favorable year" indicating a somewhat larger than expected crop.
Davies, R. W. and S. G. Wheatcroft. The Years Of Hunger.. New York: Palgrave Macmillan. 2004: 441 note 145.
Davies, R. W. and S. G. Wheatcroft. The Years Of Hunger.. New York: Palgrave Macmillan. 2004: 441 note 145.