The UK student group People and Planet have produced a bulletin for campaigners involved in FairTrade campaigning. The bulletin looks at cotton production and targets the Primark chain.
go here:
http://peopleandplanet.org/tradejustice/highcost [1]
and open the document 'High Street - High Cost'

Also on this page: 'White gold, the true cost of cotton', a useful 48 page report by the Economic Justice Foundation