http://www.webmd.com/brain/mad-cow-disease-basics
https://www.organicconsumers.org/campaigns/mad-cow-usa
http://www.cdc.gov/ncidod/dvrd/bse/
http://kidshealth.org/kid/talk/qa/mad_cow_disease.html
http://www.fda.gov/AnimalVeterinary/ResourcesforYou/AnimalHealthLiteracy/ucm136222.htm
http://www.emedicinehealth.com/mad_cow_disease_and_variant_creutzfeldt-jakob/article_em.htm
https://www.organicconsumers.org/campaigns/mad-cow-usa
http://www.cdc.gov/ncidod/dvrd/bse/
http://kidshealth.org/kid/talk/qa/mad_cow_disease.html
http://www.fda.gov/AnimalVeterinary/ResourcesforYou/AnimalHealthLiteracy/ucm136222.htm
http://www.emedicinehealth.com/mad_cow_disease_and_variant_creutzfeldt-jakob/article_em.htm