Columbia subject headings:
Arctic National Wildlife Refuge (Alaska)
Oil well drilling--Alaska--Arctic National Wildlife Refuge.
Petroleum engineering--Alaska--Arctic National Wildlife Refuge.
Petroleum industry and trade--Alaska--Arctic National Wildlife Refuge.
Harvard subject headings:
Arctic National Wildlife Refuge (Alaska)
Oil well drilling--Alaska--Arctic National Wildlife Refuge.
Petroleum engineering--Alaska--Arctic National Wildlife Refuge.
Petroleum industry and trade--Alaska--Arctic National Wildlife Refuge.
Princeton subject headings:
Arctic National Wildlife Refuge (Alaska)
Oil well drilling--Alaska--Arctic National Wildlife Refuge.
Petroleum engineering--Alaska--Arctic National Wildlife Refuge.
Petroleum industry and trade--Alaska--Arctic National Wildlife Refuge.