http://oddwinds.wikispaces.com/Basset+Horn
http://oddwinds.wikispaces.com/Alto+Clarinet
http://www.asahi-net.or.jp/~rb5h-ngc/e/k621b.htm
http://www.jlpublishing.com/ClarinetHistory.htm a good one
http://www.bartleby.com/61/58/B0105850.html
http://www.music123.com/Selmer-25-Bassett-Horn-i70825.music
http://hem.passagen.se/eriahl/clarinet.htm
www.selmer.fr/images/pdf/famclareng.pdf
http://www.grahamnasby.com/misc/clarinet_family.shtml
http://www.answers.com/topic/clarinet
http://www.answers.com/topic/basset-horn?method=8

and of course...

http://www.vsl.co.at/en-us/70/3161/3173/3175/5577.vsl

I'm bored now.