杠杆 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "杠杆" in Chinese language version.

refsWebsite

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archive.org

Humphrey, John. Ancient technology illustrated. Greenwood Publishing Group. 2006: 17-18. ISBN 9780313327636.
Usher, Abbott. A history of mechanical inventions revised, illustrated. Courier Dover Publications. 1988: pp. 94. ISBN 9780486255934.
Mackay, Alan Lindsay. Archimedes ca 287–212 BC. A Dictionary of scientific quotations. London: Taylor and Francis. 1991: pp. 11. ISBN 9780750301060.
Ceccarelli, Marco. Distinguished Figures in Mechanism and Machine Science: Their Contributions and Legacies. Dordrecht: Springer. 2007: 16 [2010-01-17]. ISBN 1402063652. Then in 1743 John Wyatt (1700–1766) introduced the idea of the compound lever, in which two or more levers work together to further reduce effort.