Carbon-13 evidence of natural and anthropogenic changes to the global methane budget in the past 1000 years.

Etheridge D., Ferretti D., Miller J., White J., Lowe D., Trudinger C., Lassey K., MacFarling C., Dreier M., van Ommen T., Langenfelds R., Allison C. (2003) Carbon-13 evidence of natural and anthropogenic changes to the global methane budget in the past 1000 years, Cape Grim Baseline Air Pollution Station Annual Science Meeting, 2003. CSIRO Atmospheric Research. 23-24 October 2003. 19;