Columbia subject headings:
Harvard subject headings:
Clean coal technologies--China--Periodicals.
Coal preparation--Environmental aspects--China--Periodicals.
Coal preparation--Technological innovations--China--Periodicals.
Coal--Desulfurization--China--Periodicals.
United States. Department of Energy. Office of Clean Coal Technology--Periodicals.
Princeton subject headings:
Coal preparation--Environmental aspects--China--Periodicals.
Coal preparation--Technological innovations--China--Periodicals.
Coal--Desulfurization--China--Periodicals.
Periodicals.
United States. Department of Energy. Office of Clean Coal Technology--Periodicals.