Chairman Mao's theory of the differentiation of the three worlds is a major contribution to Marxism-Leninism : People's Daily, November 1, 1977 - Ren min ri bao she. (Peking : Foreign Language Press, 1977)
Colophon title: Mao zhu xi guan yu san ge shi jie hua fen de li lun shi dui Makesi Liening zhu yi de zhong da gong xian.
Includes bibliographical references.
Keywords: Mao, Zedong, -- 1893-1976.; World politics