Columbia subject headings:
Heilongjiang Sheng (China)--Commerce--Periodicals.
Harvard subject headings:
Heilongjiang Sheng (China)--Commerce--Periodicals.
Heilongjiang Sheng (China)--Foreign economic relations--Periodicals.
Princeton subject headings:
Heilongjiang Sheng (China)--Commerce--Periodicals.
Heilongjiang Sheng (China)--Foreign economic relations--Periodicals.
Periodicals.