Puuvillapõõsas
suure kriisi.
Kasutatud allikad
http://en.wikipedia.org/wiki/File:CottonYield.png
http://yourgreenreview.com/2008/07/conventionallygrowncottonpart1pesticides/
http://83coppersun1.wikispaces.com/Life+of+Slaves+in+Antebellum+America
http://www.aiasober.ee/liigikirjeldused/181
http://www.organicnaturenews.com/factsaboutcotton.html
http://en.wikipedia.org/wiki/File:Cotton_fibre_production.svg
http://ganyardhillfarm.com/barn_news/teachingresources/cottonfacts/
http://www.tnhistoryforkids.org/geography/e_5
http://en.wikipedia.org/wiki/Cotton#Uses
http://www.burchardgalleries.com/auctions/1999/jan2499/jan2499r.htm
annaabi.ee 
