"Stakhanov movement." . . "Zhong gong xi bei zhong yang ju diao cha yan jiu shi." . . "中共西北中央局調查研究室." . "Agriculture China (Communist areas, 1927-1949)" . . . . . "馬家溝和陳德發" . . . "Ma Jiagou he Chen Defa" . "Majiagou he Chen Defa" . . . . . . . . . . . .