Lever (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Lever" in English language version.

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archive.org

Bruno, Leonard C.; Olendorf, Donna (1997). Science and technology firsts. Gale Research. p. 2. ISBN 9780787602567. 4400 B.C. Earliest evidence of the use of a horizontal loom is its depiction on a pottery dish found in Egypt and dated to this time. These first true frame looms are equipped with foot pedals to lift the warp threads, leaving the weaver's hands free to pass and beat the weft thread.

Davidovits, Paul (2008). "Chapter 1". Physics in Biology and Medicine (3rd ed.). Academic Press. p. 10. ISBN 978-0-12-369411-9. Archived from the original on 2014-01-03. Retrieved 2016-02-23.
Usher, A. P. (1929). A History of Mechanical Inventions. Harvard University Press (reprinted by Dover Publications 1988). p. 94. ISBN 978-0-486-14359-0. OCLC 514178. Archived from the original on 26 July 2020. Retrieved 7 April 2013.

"Etymology of the word "lever" in the Online Etymological". Archived from the original on 2015-05-12. Retrieved 2015-04-29.
Davidovits, Paul (2008). "Chapter 1". Physics in Biology and Medicine (3rd ed.). Academic Press. p. 10. ISBN 978-0-12-369411-9. Archived from the original on 2014-01-03. Retrieved 2016-02-23.
Usher, A. P. (1929). A History of Mechanical Inventions. Harvard University Press (reprinted by Dover Publications 1988). p. 94. ISBN 978-0-486-14359-0. OCLC 514178. Archived from the original on 26 July 2020. Retrieved 7 April 2013.

Chisholm, Hugh, ed. (1911). "Lever" . Encyclopædia Britannica. Vol. 16 (11th ed.). Cambridge University Press. p. 510.

Usher, A. P. (1929). A History of Mechanical Inventions. Harvard University Press (reprinted by Dover Publications 1988). p. 94. ISBN 978-0-486-14359-0. OCLC 514178. Archived from the original on 26 July 2020. Retrieved 7 April 2013.