Wikipedia

[dillosk8ter]

Free encylopedia site, great section on Citroen, Hydropneumatics, model range both past and present. Prob just as good for Pug and Renault too. Great write ups on the individual models.
en.wikipedia.org

[howard]

Great site wikipedia, its gone massive now, well worth a look round

http://en.wikipedia.org/

[deian]

yes, i agree, it's probably one of the most useful sites ever by now, i'm on it nearly everyday learning something new