Columbia subject headings:
Harvard subject headings:
Eschenmayer, C. A. (Carl August), 1768-1852--Contributions in philosophy of nature.
Philosophy of nature--History--19th century.
Schelling, Friedrich Wilhelm Joseph von, 1775-1854--Contributions in philosophy of nature.
Princeton subject headings:
Eschenmayer, C. A. (Carl August), 1768-1852.
Philosophy of nature--History--19th century.
Schelling, Friedrich Wilhelm Joseph von, 1775-1854.