Keywords: Production of oil shale.png Production of oil shale svg en Production of oil shale in millions of metric tons from 1880 to 2010 2011-09-02 Original file from the United States Geological Survey report http //pubs usgs gov/sir/2005/5294/pdf/sir5294_508 pdf ; updated by Alan Burnham and Pierre Allix and published in the Schlumberg Oilfield Review Volume 22 Issue 4 publication date 12/01/2010 http //www slb com/~/media/Files/resources/oilfield_review/ors10/win10/coaxing ashx The graph with permissions is sent to me by Alan Burnham by e-mail United States Geological Survey; Alan K Burnham; Pierre Allix Permission to use this graph is granted by Alan Burnham The e-mail sent by Alan Burnham to me says It is not copyrighted ”I made it specifically for wide use cc-by-3 0 PD-USGov Oil production trends Oil shale |