This is a collection of primary source documents focusing on the Sino-Soviet alliance from 1950 through 1959, or the period prior to the split. For other collections on Sino-Soviet relations, see Making of the Sino-Soviet Alliance, 1945-1950; Sino-Soviet Split, 1960-1984; Sino-Soviet Border Conflict, 1969; and Sino-Soviet Rapprochement, 1985-1989. For a collections resource guide see The Sino-Soviet Alliance, 70 Years Later.