Columbia subject headings:
Artists--Germany--Correspondence.
Hackert, Philipp, 1737-1807--Correspondence.
Meerman, Johan, 1753-1815--Correspondence.
Harvard subject headings:
Artists--Germany--Correspondence.
Hackert, Philipp, 1737-1807--Correspondence.
Meerman, Johan, 1753-1815--Correspondence.
Princeton subject headings:
Hackert, Philipp, 1737-1807--Correspondence.
Meerman, Johan, 1753-1815.
Reiffenstein, Johann Friedrich, 1719-1793--Correspondence.