Shale-gas plays of North America /
Petroleum Economist Ltd.
Bush, P.
Fuller, K.
Petroleum Economist Cartographic (Firm)
NPA Satellite Mapping (Firm)
Fugro NPA Limited.
Norske stats oljeselskap.
London : Petroleum Economist Ltd.,
c2011.
Relief shown by gradient tints.
Inset map: West Canadian shale gas.
"satellite imagery courtesy of NPA Mapping [and] Fugro , Fugro NPA Limited.."
"June 2011."
"Petroleum Economist Cartographic".
Oil-shales
Natural gas