Columbia subject headings:
Botany--Political aspects--Palestine.
Warburg, Otto, 1959-1938.
Zionism.
Harvard subject headings:
Botany--Political aspects--Palestine.
Warburg, Otto, 1859-1938
Zionism
Princeton subject headings:
Botany--Political aspects--Palestine.
Warburg, Otto, 1859-1938.
Zionism.