Cite
MLA (8th Edition)
Helicopter Electromagnetic and Magnetic Survey Maps and Data, East Poplar Oil Field Area, August 2004, Fort Peck Indian Reservation, Northeastern Montana. U.S. Geological Survey, 2006.
APA (7th Edition)
Helicopter electromagnetic and magnetic survey maps and data, East Poplar Oil Field area, August 2004, Fort Peck Indian Reservation, northeastern Montana. (2006). U.S. Geological Survey.
Chicago (17th Edition)
“Helicopter Electromagnetic and Magnetic Survey Maps and Data, East Poplar Oil Field Area, August 2004, Fort Peck Indian Reservation, Northeastern Montana.” Reston, Va.?: U.S. Geological Survey, 2006.