This image is a derivative work of the following images: File:Vostok_Petit_data.svg licensed with Cc-by-sa-3.0-migrated, GFDL 2011-09-25T17:39:49Z Hel-hama...
Data sets used are: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/co2nat...
