Hyperradiant Fresnel lens (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hyperradiant Fresnel lens" in English language version.

refsWebsite

Global rank English rank

2web.archive.org

1^st place

1^st place

2goindustrial.co.uk

low place

low place

low place

low place

1commissionersofirishlights.com

low place

low place

1thegazette.co.uk

200^th place

141^st place

commissionersofirishlights.com

"John Richardson Wigham 1829–1906" (PDF). BEAM. 35. Commissioners of Irish Lights: 21–22. 2006. Archived from the original (PDF) on 12 March 2012.

goindustrial.co.uk

"Bullseye lens part from Buchan Ness Lighthouse". goindustrial.co.uk. Retrieved 12 July 2020.
"Part of a prism from Flannan Isle". goindustrial.co.uk. Retrieved 12 July 2020.

thegazette.co.uk

"Notice to Mariners" (PDF). The London Gazette. 17 September 1889. Retrieved 12 July 2020.

uslhs.org

"Hyper-Radial Lenses". United States Lighthouse Society. Archived from the original on 11 February 2021. Retrieved 2 February 2016.

web.archive.org

"Hyper-Radial Lenses". United States Lighthouse Society. Archived from the original on 11 February 2021. Retrieved 2 February 2016.
"John Richardson Wigham 1829–1906" (PDF). BEAM. 35. Commissioners of Irish Lights: 21–22. 2006. Archived from the original (PDF) on 12 March 2012.