Spiral bridge (English Wikipedia)

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

refsWebsite

Global rank English rank

70^th place

63^rd place

1books.google.com

3^rd place

3^rd place

163^rd place

185^th place

books.google.com

J.W. Parker, The roads and railroads, vehicles, and modes of travelling, of ancient and modern countries, p. 154

google.com

"Google Maps". Google Maps.

loc.gov

Historic American Engineering Record (HAER) No. WY-86, "Corkscrew Bridge, Old East Entrance Road, Sylvan Pass, Lake, Teton County, WY"
Historic American Engineering Record (HAER) No. SD-54, "Pigtail Bridge, Hot Springs, Fall River County, SD"
Historic American Engineering Record (HAER) No. TN-35-Q, "The Loop Over Bridge, Gatlinburg, Sevier County, TN"