Columbia subject headings:
Harvard subject headings:
Gas industry--China--Periodicals.
Petroleum industry and trade--China--Periodicals.
Zhongguo shi you tian ran qi zong gong si--Periodicals.
Princeton subject headings:
Gas industry--China--Periodicals.
Periodicals.
Petroleum industry and trade--China--Periodicals.
Zhongguo shi you tian ran qi zong gong si--Periodicals.