Columbia subject headings:
Rulʹe, Karl Frant͡sovich, 1814-1858.
Zoologists--Soviet Union--Biography.
Harvard subject headings:
Rulʹe, Karl Frant︠s︡ovich, 1814-1858
Zoologists--Soviet Union--Biography.
Princeton subject headings:
Rulʹe, Karl Frant︠s︡ovich, 1814-1858.
Zoologists--Soviet Union--Biography.