Thanks! I'm extremely grateful for the hard work of this project! Here are a list of English sources for Mao's works. Many are already posted here. If you are able to obtain it I would give priority to Schram's Mao's Road to Power.
CMTTP Chairman Mao Talks to the People: Talks and Letters: 1956-1971, ed. by Stuart Schram, (NY: Pantheon, 1974).
CSE A Critique of Soviet Economics, by Mao Tsetung, translated by Moss Roberts, (Monthly Review Press, 1977).
MRP6-7 Mao’s Road to Power: Revolutionary Writings 1912-1949, ed. by Stuart R. Schram, (M. E. Sharpe, 1992- ). As of 2006 the first 7 of 10 projected volumes in have been published. The first 5 volumes do not seem to contain any relevant direct comments on Stalin.
NE *The New Emperors: China in the Era of Mao and Deng, by Harrison E. Salisbury, (NY: Avon Books, 1992).
SSCM The Secret Speeches of Chairman Mao: From the Hundred Flowers to the Great Leap Forward, ed. by Roderick MacFarquhar, Timothy Cheek, & Eugene Wu, Harvard Contemporary China Series: 6, The Council on East Asian Studies/Harvard University, (Harvard University Press, 1989).
SW1-3 Selected Works of Mao Tse-tung, vols. I-III, (Peking: Foreign Languages Press, 1965).
SW4 Selected Works of Mao Tse-tung, vol. IV, (Peking: Foreign Languages Press, 1961).
TMT The Thought of Mao Tse-tung, by Stuart Schram, (Cambridge University Press, 1989).
UP *Uncertain Partners: Stalin, Mao, and the Korean War, by Sergei N. Goncharov, John W. Lewis, and Xue Litai, (Stanford University Press, 1993).
WMZ1 The Writings of Mao Zedong 1949-1976, Vol. I, September 1949-December 1955, ed. by John K. Leung & Michael Y. M. Kau, (Armonk, NY: M. E. Sharpe, 1986).
WMZ2 The Writings of Mao Zedong 1949-1976, Vol. II, January 1956-December 1957, ed. by John K. Leung & Michael Y. M. Kau, (Armonk, NY: M. E. Sharpe, 1992).
Note: The items above marked with an asterisk should probably be considered somewhat less certain and reliable than the other sources listed.
* China in the Year 2001 (1967)
* Asia Today: Two Outlooks (1969)
* The Morning Deluge: Mao Tsetong and the Chinese Revolution 1893-1954 (1972)
* Lhasa, the Open City (1976)
* Wind in the Tower: Mao Tsetong and the Chinese Revolution, 1949-1965 (1976)
* China 1890-1938: From the Warlords to World War (1989; historical photo-reportage)
* Eldest Son: Zhou Enlai and the Making of Modern China (1994)