- Nova Scotia Onshore and Offshore Rights
- http://www.gov.ns.ca/energy/resources/RA/maps/Onshore-Offshore-Rights.pdf
- Map, Natural Gas, Canada
- Oil-Gas Maps, Nova Scotia Department of Energy
- http://www.gov.ns.ca/energy/oil-gas/explore-invest/maps.asp
- Website, Natural gas, Canada
- Oil and Natural Gas Licences/ Leases, NB
- http://www.gnb.ca/0078/minerals/pdf/Oil_NG_Agreements-e.pdf
- Map, Natural Gas, Canada
- Bradford Co. PA Map of Compromised Water & Gas Wells, 17-Jun-11
- http://gdacc.wordpress.com/2011/06/17/bradford-co-pa-map-of-compromised-water-gas-wells/
- Map, Natural Gas, H2o, USA