The source has more on the clashes. Source
丰满水电站, 1957
惠孝同, 秦仲文, 胡佩衡, 吴镜汀 Source
王文彬, 向自然进军 , 1971
Source
费以复, 自画像 ,1950
Source
Mao reviews Red Guards in 1966
Tiananmen, Beijing, October 1, 1966 Source
by Covell Meyskens
The source has more on the clashes. Source
惠孝同, 秦仲文, 胡佩衡, 吴镜汀 Source
Source
Source
Tiananmen, Beijing, October 1, 1966 Source