ASPO Ireland in its May 2008 newsletter , number 89 , revised its depletion model .
ASPO Ireland in its May 2008 newsletter , number 89 , advanced the date of the peak of overall liquids from 2010 to 2007 .
ASPO Ireland in its May 2008 newsletter , number 89 , revised its depletion model and advanced the date of the peak of overall liquids from 2010 to 2007 .