Georgi Dimitrov) 斯哈特日15/30型轮式拖拉机(俄语:СХТЗ 15/30),引入美国万国收割机公司(英语:InternationalHarvester)的麦考米克-迪灵(McCormick-Deering)15-30型 斯特日-纳齐履带式拖拉机(1937–49),苏联第一款自主设计的履带拖拉机
Moscow, via Nizhni and the River Volga”, The Harvester world, Volumes 2-3, (published by InternationalHarvester Co.) (1910), at page 22. (页面存档备份,存于互联网档案馆)