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Journal article
Earliest systematic coal exploitation for fuel extended to ~3600 B.P.
Coal has long fueled human civilizations. The history of systematic coal fuel exploitation has been traced back to the late third millennium before present (post-2500 B.P.). Although sporadic combustion of coal for fuel was reported in some prehistoric archaeological sites, evidence for the systematic exploitation of coal for fuel before...Qiu, Menghan ; Liu, Ruiliang ; Li, Xingyuan ; Du, Linyao ; Ruan, Qiurong …
China, metallurgy, and coal
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Book
Chairman Mao Badges: Symbols and Slogans of the Cultural Revolution
Millions of Chairman Mao badges were produced during China's Cultural Revolution, and were worn by almost all Chinese people, from Premier Zhou Enlai down to the smallest child. Made in a wide variety of materials (aluminium, plastic, bamboo, porcelain, gold, silver, copper, iron and lead) and with an extensive range...Wang, Helen
Cultural Revolution, China, badges, and Mao Zedong