#CRAN Package Archive
#Australian
#deb http://cran.ms.unimelb.edu.au/bin/linux/ubuntu precise/ 
#California (IPv6 troubles)
#deb http://cran.cnr.berkeley.edu/bin/linux/ubuntu precise/
#Austria (R master site)
deb http://cran.at.r-project.org/bin/linux/ubuntu precise/