- Principles of operation of Bicycle brake systems
- Ref for D Cable pull Ratio
- Kham kingdom?
- History of Tibet#Reign of Songtsän Gampo not just Princess Wencheng
- cogset Number and width of sprockets, 2nd ref:Bnetts, Sutherland's?
- Bicycle culture Globalize
- Brompton Bicycle ref/info from podcast
- de:Lenkkopflager translate/XReference
- ChangthangTibet info
- SunTour patent expiery
- ptr
- HinduT
