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File:Production of oil shale.png

Production_of_oil_shale.png(525 × 341 pixels, file size: 14 KB, MIME type: image/png)


English: Production of oil shale in millions of metric tons from 1880 to 2010
Date 2 September 2011
Source Original file from the United States Geological Survey report (; updated by Alan Burnham and Pierre Allix and published in the Schlumberg Oilfield Review Volume 22, Issue 4, publication date 12/01/2010 ( The graph with permissions is sent to me by Alan Burnham by e-mail
Author United States Geological Survey; Alan K. Burnham; Pierre Allix
( Reusing this file)

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."


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