Columbia subject headings:
Harvard subject headings:
Cities and towns--China--Heilongjiang Sheng--Maps.
Heilongjiang Sheng (China)--Boundaries--Maps.
Heilongjiang Sheng (China)--Commerce--Maps.
Heilongjiang Sheng (China)--Economic conditions--Maps.
Transportation--China--Heilongjiang Sheng--Maps.
Princeton subject headings:
Cities and towns--China--Heilongjiang Sheng--Maps.
Heilongjiang Sheng (China)--Boundaries--Maps.
Heilongjiang Sheng (China)--Commerce--Maps.
Heilongjiang Sheng (China)--Economic conditions--Maps.
Transportation--China--Heilongjiang Sheng--Maps.