http://en.wikipedia.org/wiki/Legal_recognition_of_sign_languages
http://en.academic.ru/dic.nsf/enwiki/1654236
Information about 130 Sign languages
http://www.ethnologue.com/show_family.asp?subid=23-16
PDF – 168 pages
http://www.coe.int/t/e/social_cohesion/soc-sp/5720-0-ID2283-Langue%20signe_GB%20assemble.pdf
http://ec.europa.eu/education/languages/languages-of-europe/doc189_en.htm
http://www.eud.eu/EUD_Members-i-159.html
http://muse.jhu.edu/journals/sign_language_studies/
http://www.wfdeaf.org/documents.html