Columbia subject headings:
Harvard subject headings:
Chemistry, Organic--Germany.
Chemists--Germany--Correspondence.
Liebig, Justus, Freiherr von, 1803-1873--Correspondence.
Vieweg, Eduard, 1797-1869--Correspondence.
Princeton subject headings:
Chemistry--Germany--History.
Chemists--Germany--Correspondence.
Liebig, Justus, Freiherr von, 1803-1873.
Vieweg, Eduard, 1797-1869.