Columbia subject headings:
Employee rights--Nigeria.
Petroleum industry and trade--Environmental aspects--Nigeria.
Petroleum industry and trade--Social aspects--Nigeria.
Petroleum workers--Nigeria.
Harvard subject headings:
Employee rights--Nigeria.
Niger River Delta (Nigeria)--Economic conditions--Congresses.
Niger River Delta (Nigeria)--Social conditions--Congresses.
Petroleum industry and trade--Environmental aspects--Nigeria.
Petroleum industry and trade--Nigeria--Niger River Delta--Congresses.
Petroleum industry and trade--Social aspects--Nigeria.
Petroleum workers--Nigeria.
Princeton subject headings: