Chairman Mao's theory of the differentiation of the three worlds is a major contribution to Marxism-Leninism People's Daily, November 1, 1977
Jen min jih pao, Peking.
Peking Foreign Language Press
1977
Colophon title: Mao chu hsi kuan yü san ko shih chieh hua fen ti li lun shih tui Ma-kʻo-ssu Lieh-ning chu i ti chung ta kung hsien
Includes bibliographical references
Mao, Zedong, 1893-1976