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==Tham khảo==
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== Đọc thêm ==
* Brunt, Liam. "Mechanical Innovation in the Industrial Revolution: The Case of Plough Design". ''Economic History Review'' (2003) 56#3, pp. 444–477. {{JSTOR|3698571}}.
* Hill, P. and Kucharski, K. "Early Medieval Ploughing at Whithorn and the Chronology of Plough Pebbles", ''Transactions of the Dumfriesshire and Galloway Natural History and Antiquarian Society'', Vol. LXV, 1990, pp 73–83.
* Nair, V. Sankaran. ''Nanchinadu: Harbinger of Rice and Plough Culture in the Ancient World''.
* {{cite journal |last=Wainwright |first=Raymond P. |author2=Wesley F. Buchele |author3=Stephen J. Marley |author4=William I. Baldwin |title=A Variable Approach-Angle Moldboard Plow |journal=Transactions of the ASAE |year=1983 |volume=26 |issue=2 |pages=392–396 |url=http://lib.dr.iastate.edu/abe_eng_pubs/134/ |doi=10.13031/2013.33944}}
* Steven Stoll, Larding the Lean Earth: Soil and Society in Nineteenth-Century America (New York: Hill and Wang, 2002)
 
==Liên kết ngoài==
{{Wiktionary}}
{{commons category|Ploughs}}
* [http://www.rotherhamweb.co.uk/h/plough.htm The Rotherham Plough] – ''the first commercially successful iron plough''
* [http://www.deere.com/en_US/compinfo/history/index.html History of the steel plough] – ''as developed by John Deere in the US''
* [http://www.antiquefarmtools.info/ Breast Ploughs and other antique hand farm tools]
* [http://books.google.com/books?id=yt8DAAAAMBAJ&pg=PA877#v=onepage&q=&f=true "Tractor Guide Saves Labor for the Farmer"], ''[[Popular Mechanics]]'', December 1934.
 
 
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{{Commonscat|Ploughs}}