Columbia subject headings:
Biology--Soviet Union--History.
Biology--Soviet Union--Philosophy--History.
Darwin, Charles, 1809-1882.
Malthus, T. R. (Thomas Robert), 1766-1834.
Natural selection--History.
Harvard subject headings:
Biology--Soviet Union--History.
Biology--Soviet Union--Philosophy--History.
Darwin, Charles, 1809-1882
Malthus, T. R. (Thomas Robert), 1766-1834.
Natural selection--History.
Princeton subject headings:
Biology--Soviet Union--History.
Biology--Soviet Union--Philosophy--History.
Darwin, Charles, 1809-1882.
Malthus, T. R. (Thomas Robert), 1766-1834.
Natural selection--History.