Nigra marmoro de Ashford (Esperanto Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nigra marmoro de Ashford" in Esperanto language version.

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Tom Bates (2007-06-07) Ashford Black Marble. Arkivita kopio. Arkivita el la originalo je 2011-07-27. Alirita 2011-06-23.

culture24.org.uk

Rare Ashford Black Marble Returns To Buxton Museum. Culture24 (2006-01-31).

derbyshire.gov.uk

Tomlinson Collection. Derbyshire County Council.

doi.org

Michael P. Cooper (2005). “The Devonshire Mineral Collection of Chatsworth House”, Mineralogical Record (30 Aprilo 2005). doi:http://www.blnz.com/news/2008/04/23/DEVONSHIRE_MINERAL_COLLECTION_Chatsworth_House_8972.html.

genuki.org.uk

Bygone Industries of the Peak:Ashford Black Marble. Arkivita el la originalo je 2010-08-09. Alirita 2011-06-23. Arkivita kopio. Arkivita el la originalo je 2010-08-09. Alirita 2011-06-23.

geocurator.org

Newsletter of the Geological Curators Club Vol 1, No. 8, 1976 (PDF). Geological Curators Club (1976).^{[rompita ligilo]}

google.co.uk

books.google.co.uk

Martin, William. (1809) Petrificata Derbiensia p33-34. “p39 Fig 4....A fossil shell. The original a nautilus ....The crocodile said to be found in the limestone of Ashford, appears to be just a large specimen of this or some other Orthoceratite”.

thisisderbyshire.co.uk

Black marble to go under auction hammer. This Is Derbyshire (2009-06-06). Arkivita el la originalo je 2012-09-25. Alirita 2011-06-23. Arkivita kopio. Arkivita el la originalo je 2012-09-25. Alirita 2021-09-03.

web.archive.org

Bygone Industries of the Peak:Ashford Black Marble. Arkivita el la originalo je 2010-08-09. Alirita 2011-06-23. Arkivita kopio. Arkivita el la originalo je 2010-08-09. Alirita 2011-06-23.
Black marble to go under auction hammer. This Is Derbyshire (2009-06-06). Arkivita el la originalo je 2012-09-25. Alirita 2011-06-23. Arkivita kopio. Arkivita el la originalo je 2012-09-25. Alirita 2021-09-03.
Tom Bates (2007-06-07) Ashford Black Marble. Arkivita kopio. Arkivita el la originalo je 2011-07-27. Alirita 2011-06-23.