Columbia subject headings:
Fichte, Johann Gottlieb, 1762-1814.
Kierkegaard, Søren, 1813-1855.
Harvard subject headings:
Fichte, Johann Gottlieb, 1762-1814.
Kierkegaard, Søren, 1813-1855
Ontology.
Princeton subject headings:
Fichte, Johann Gottlieb, 1762-1814--Ontology.
Kierkegaard, Søren, 1813-1855--Ontology.