Domain Category Type Num. Articles Num. Wikipedia Pages Importance
books.google.com ngo data 1443 788 6.67
web.archive.org ngo data 872 568 6.34
dx.doi.org ngo data 340 331 5.81
archive.org ngo data 440 296 5.69
www.historyofparliamentonline.org ngo data 315 289 5.66
www.routesonline.com ngo data 334 286 5.64
books.google.co.uk ngo data 259 178 5.18
www.amazon.com ngo data 256 176 5.15
www.jstor.org ngo articles 112 168 5.11
www.google.com ngo data 222 165 5.11
www.alexa.com ngo data 164 151 5.01
id.biodiversity.org.au ngo data 170 133 4.87
www.iucnredlist.org ngo data 108 127 4.85
www.britannica.com ngo data 178 115 4.73
www.findagrave.com ngo data 107 108 4.69
data.worldbank.org ngo data 90 88 4.49
www.ch-aviation.com ngo data 15 87 4.48
www.biodiversitylibrary.org ngo data 99 87 4.48
www.worldcat.org ngo data 126 84 4.44
bridgereports.com ngo data 78 78 4.37
books.google.com.au ngo articles 111 67 4.19
www.wsc.nmbe.ch ngo data 60 60 4.03
www.merriam-webster.com ngo data 48 48 3.87
bie.ala.org.au ngo data 37 37 3.64
openknowledge.worldbank.org ngo data 5 38 3.64