Columbia subject headings:
Petroleum chemicals industry--Management.
Petroleum chemicals industry--Technological innovations--United States.
Petroleum chemicals industry--Technological innovations.
Petroleum chemicals industry--United States--Management.
Harvard subject headings:
Petroleum chemicals industry--Management.
Petroleum chemicals industry--Technological innovations--United States.
Petroleum chemicals industry--Technological innovations.
Petroleum chemicals industry--United States--Management.
Princeton subject headings:
Petroleum chemicals industry--Management.
Petroleum chemicals industry--Technological innovations.
Petroleum chemicals industry--United States--Management.
Petroleum chemicals industry--United States--Technological innovations.