社社會問題社會問題de Menghe TaoMateriasSocial problems (Works pub. 1919-1938)Ediciones (1)社會問題 (1927)Shang wu yin shu guan · chinoMás obras de Menghe TaoMMenghe wen cunMenghe wen cunZZhongguo lao gong sheng huo cheng duZhongguo lao gong sheng huo cheng duLLivelihood in PekingLivelihood in Peking