Pencil (Simple English Wikipedia)

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

Last modified: 19:06:09, 7 August 2026 (UTC)

Ref.Un. Ref.Website

Global rank Simple English rank

55web.archive.org

1^st place

1^st place

22historyofinformation.com

low place

3,193^rd place

low place

low place

low place

9,618^th place

11cumbria-industries.org.uk

low place

low place

2,156^th place

867^th place

11thefreedictionary.com

1,251^st place

269^th place

11pencilmuseum.co.uk

low place

low place

11pesticideinfo.org

low place

low place

11rocketcityspacepioneers.com

low place

low place

2,155^th place

1,541^st place

6^th place

3^rd place

673^rd place

451^st place

answers.com (Global: 2,156^th place; Simple English: 867^th place)

"Definition of Plumbago". Answers.com. Retrieved 2007-04-21.

archive.org (Global: 6^th place; Simple English: 3^rd place)

Petroski, Henry (1990). The Pencil: A History of Design and Circumstance. New York: Alfred A. Knopf. pp. 171. ISBN 0-394-57422-2.

cumbria-industries.org.uk (Global: low place; Simple English: low place)

"Lakeland's Mining Heritage". www.cumbria-industries.org.uk. Retrieved 2008-03-27.

historyofinformation.com (Global: low place; Simple English: 3,193^rd place)

"Origin of the pencil". Archived from the original on 12 May 2013. Retrieved 9 May 2013.
"Invention of Modern Pencil Lead". Retrieved 9 May 2013.^{[permanent dead link]}

justia.com (Global: 673^rd place; Simple English: 451^st place)

supreme.justia.com

"Reckendorfer v. Faber 92 U.S. 347 (1875)". Supreme.justia.com. Retrieved 2009-07-23.

mtu.edu (Global: low place; Simple English: 9,618^th place)

phy.mtu.edu

"Graphite from the Plumbago Mine, Borrowdale, England". Department of Physics at Michigan Technological University. Retrieved 2008-03-27.

pencilmuseum.co.uk (Global: low place; Simple English: low place)

"Keswick Pencil Museum". Pencilmuseum.co.uk. Retrieved 2009-07-23.

pesticideinfo.org (Global: low place; Simple English: low place)

"Graphite - Identification, toxicity, use, water pollution potential, ecological toxicity, and regulatory information". Pesticideinfo.org. Archived from the original on 2009-06-18. Retrieved 2009-07-23.

port.ac.uk (Global: low place; Simple English: low place)

geog.port.ac.uk

Martin and Jean Norgate, Geography Department, Portsmouth University (2008). "Old Cumbria Gazetteer, black lead mine, Seathwaite". Archived from the original on 2009-01-07. Retrieved 2008-05-19.{{cite web}}: CS1 maint: multiple names: authors list (link)

rocketcityspacepioneers.com (Global: low place; Simple English: low place)

"Who invented the pencil?". Archived from the original on 22 February 2012. Retrieved 9 May 2013.

thefreedictionary.com (Global: 1,251^st place; Simple English: 269^th place)

"Definition of Plumbago". Thefreedictionary.com. Retrieved 2007-04-21.

uspto.gov (Global: 2,155^th place; Simple English: 1,541^st place)

patft.uspto.gov

"US Patent 19783 Combination of Lead-Pencil and Eraser by L. Lipman". Patft.uspto.gov. Archived from the original on 2017-05-02. Retrieved 2009-07-23.

web.archive.org (Global: 1^st place; Simple English: 1^st place)

Martin and Jean Norgate, Geography Department, Portsmouth University (2008). "Old Cumbria Gazetteer, black lead mine, Seathwaite". Archived from the original on 2009-01-07. Retrieved 2008-05-19.{{cite web}}: CS1 maint: multiple names: authors list (link)
"Graphite - Identification, toxicity, use, water pollution potential, ecological toxicity, and regulatory information". Pesticideinfo.org. Archived from the original on 2009-06-18. Retrieved 2009-07-23.
"Who invented the pencil?". Archived from the original on 22 February 2012. Retrieved 9 May 2013.
"Origin of the pencil". Archived from the original on 12 May 2013. Retrieved 9 May 2013.
"US Patent 19783 Combination of Lead-Pencil and Eraser by L. Lipman". Patft.uspto.gov. Archived from the original on 2017-05-02. Retrieved 2009-07-23.