ND Websites:
North Dakota Industrial Commission
North Dakota State Land Department
North Dakota Industrial Commission
North Dakota State Land Department
MT Websites:
Montana Board of Oil and Gas
Montana Trust Land Mgmt
CO Websites:
Colorado State Land Board
IN Websites:
Indiana DNR Division of Oil and Gas
MI Websites:
Michigan DEQ, Office of Oil, Gas and Minerals
WY Websites:
Wyoming Oil and Gas Conservation Commission
Office of State Lands & Investments
TX Websites:
Railroad Commission of Texas
Federal Websites:
General Land Office Records