Columbia subject headings:
Harvard subject headings:
Azaleas--Japan--Early works to 1800.
Azaleas--Varieties--Early works to 1800.
Azaleas--Varieties--Japan--Early works to 1800.
Princeton subject headings:
Azaleas--Japan--Early works to 1800.
Azaleas--Japan--Varieties--Early works to 1800.
Azaleas--Varieties--Early works to 1800.